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 WGET(1)                       GNU Wget 1.19.5                       WGET(1)
 GNU Wget                                                           GNU Wget

                                 2018-05-09



 NAME
      Wget - The non-interactive network downloader.

 SYNOPSIS
      wget [option]... [URL]...

 DESCRIPTION
      GNU Wget is a free utility for non-interactive download of files from
      the Web.  It supports HTTP, HTTPS, and FTP protocols, as well as
      retrieval through HTTP proxies.

      Wget is non-interactive, meaning that it can work in the background,
      while the user is not logged on.  This allows you to start a retrieval
      and disconnect from the system, letting Wget finish the work.  By
      contrast, most of the Web browsers require constant user's presence,
      which can be a great hindrance when transferring a lot of data.

      Wget can follow links in HTML, XHTML, and CSS pages, to create local
      versions of remote web sites, fully recreating the directory structure
      of the original site.  This is sometimes referred to as "recursive
      downloading."  While doing that, Wget respects the Robot Exclusion
      Standard (/robots.txt).  Wget can be instructed to convert the links
      in downloaded files to point at the local files, for offline viewing.

      Wget has been designed for robustness over slow or unstable network
      connections; if a download fails due to a network problem, it will
      keep retrying until the whole file has been retrieved.  If the server
      supports regetting, it will instruct the server to continue the
      download from where it left off.

 OPTIONS
    Option Syntax
      Since Wget uses GNU getopt to process command-line arguments, every
      option has a long form along with the short one.  Long options are
      more convenient to remember, but take time to type.  You may freely
      mix different option styles, or specify options after the command-line
      arguments.  Thus you may write:

              wget -r --tries=10 http://fly.srk.fer.hr/ -o log

      The space between the option accepting an argument and the argument
      may be omitted.  Instead of -o log you can write -olog.

      You may put several options that do not require arguments together,
      like:

              wget -drc <URL>

      This is completely equivalent to:



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 WGET(1)                       GNU Wget 1.19.5                       WGET(1)
 GNU Wget                                                           GNU Wget

                                 2018-05-09



              wget -d -r -c <URL>

      Since the options can be specified after the arguments, you may
      terminate them with --.  So the following will try to download URL -x,
      reporting failure to log:

              wget -o log -- -x

      The options that accept comma-separated lists all respect the
      convention that specifying an empty list clears its value.  This can
      be useful to clear the .wgetrc settings.  For instance, if your
      .wgetrc sets "exclude_directories" to /cgi-bin, the following example
      will first reset it, and then set it to exclude /~nobody and
      /~somebody.  You can also clear the lists in .wgetrc.

              wget -X " -X /~nobody,/~somebody

      Most options that do not accept arguments are boolean options, so
      named because their state can be captured with a yes-or-no ("boolean")
      variable.  For example, --follow-ftp tells Wget to follow FTP links
      from HTML files and, on the other hand, --no-glob tells it not to
      perform file globbing on FTP URLs.  A boolean option is either
      affirmative or negative (beginning with --no).  All such options share
      several properties.

      Unless stated otherwise, it is assumed that the default behavior is
      the opposite of what the option accomplishes.  For example, the
      documented existence of --follow-ftp assumes that the default is to
      not follow FTP links from HTML pages.

      Affirmative options can be negated by prepending the --no- to the
      option name; negative options can be negated by omitting the --no-
      prefix.  This might seem superfluous---if the default for an
      affirmative option is to not do something, then why provide a way to
      explicitly turn it off?  But the startup file may in fact change the
      default.  For instance, using "follow_ftp = on" in .wgetrc makes Wget
      follow FTP links by default, and using --no-follow-ftp is the only way
      to restore the factory default from the command line.

    Basic Startup Options
      -V
      --version
          Display the version of Wget.

      -h
      --help
          Print a help message describing all of Wget's command-line
          options.




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 WGET(1)                       GNU Wget 1.19.5                       WGET(1)
 GNU Wget                                                           GNU Wget

                                 2018-05-09



      -b
      --background
          Go to background immediately after startup.  If no output file is
          specified via the -o, output is redirected to wget-log.

      -e command
      --execute command
          Execute command as if it were a part of .wgetrc.  A command thus
          invoked will be executed after the commands in .wgetrc, thus
          taking precedence over them.  If you need to specify more than one
          wgetrc command, use multiple instances of -e.

    Logging and Input File Options
      -o logfile
      --output-file=logfile
          Log all messages to logfile.  The messages are normally reported
          to standard error.

      -a logfile
      --append-output=logfile
          Append to logfile.  This is the same as -o, only it appends to
          logfile instead of overwriting the old log file.  If logfile does
          not exist, a new file is created.

      -d
      --debug
          Turn on debug output, meaning various information important to the
          developers of Wget if it does not work properly.  Your system
          administrator may have chosen to compile Wget without debug
          support, in which case -d will not work.  Please note that
          compiling with debug support is always safe---Wget compiled with
          the debug support will not print any debug info unless requested
          with -d.

      -q
      --quiet
          Turn off Wget's output.

      -v
      --verbose
          Turn on verbose output, with all the available data.  The default
          output is verbose.

      -nv
      --no-verbose
          Turn off verbose without being completely quiet (use -q for that),
          which means that error messages and basic information still get
          printed.




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 WGET(1)                       GNU Wget 1.19.5                       WGET(1)
 GNU Wget                                                           GNU Wget

                                 2018-05-09



      --report-speed=type
          Output bandwidth as type.  The only accepted value is bits.

      -i file
      --input-file=file
          Read URLs from a local or external file.  If - is specified as
          file, URLs are read from the standard input. (Use ./- to read from
          a file literally named -.)

          If this function is used, no URLs need be present on the command
          line.  If there are URLs both on the command line and in an input
          file, those on the command lines will be the first ones to be
          retrieved.  If --force-html is not specified, then file should
          consist of a series of URLs, one per line.

          However, if you specify --force-html, the document will be
          regarded as html.  In that case you may have problems with
          relative links, which you can solve either by adding "<base
          href="url">" to the documents or by specifying --base=url on the
          command line.

          If the file is an external one, the document will be automatically
          treated as html if the Content-Type matches text/html.
          Furthermore, the file's location will be implicitly used as base
          href if none was specified.

      --input-metalink=file
          Downloads files covered in local Metalink file. Metalink version 3
          and 4 are supported.

      --keep-badhash
          Keeps downloaded Metalink's files with a bad hash. It appends
          .badhash to the name of Metalink's files which have a checksum
          mismatch, except without overwriting existing files.

      --metalink-over-http
          Issues HTTP HEAD request instead of GET and extracts Metalink
          metadata from response headers. Then it switches to Metalink
          download.  If no valid Metalink metadata is found, it falls back
          to ordinary HTTP download.  Enables Content-Type:
          application/metalink4+xml files download/processing.

      --metalink-index=number
          Set the Metalink application/metalink4+xml metaurl ordinal NUMBER.
          From 1 to the total number of "application/metalink4+xml"
          available.  Specify 0 or inf to choose the first good one.
          Metaurls, such as those from a --metalink-over-http, may have been
          sorted by priority key's value; keep this in mind to choose the
          right NUMBER.



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 WGET(1)                       GNU Wget 1.19.5                       WGET(1)
 GNU Wget                                                           GNU Wget

                                 2018-05-09



      --preferred-location
          Set preferred location for Metalink resources. This has effect if
          multiple resources with same priority are available.

      -F
      --force-html
          When input is read from a file, force it to be treated as an HTML
          file.  This enables you to retrieve relative links from existing
          HTML files on your local disk, by adding "<base href="url">" to
          HTML, or using the --base command-line option.

      -B URL
      --base=URL
          Resolves relative links using URL as the point of reference, when
          reading links from an HTML file specified via the -i/--input-file
          option (together with --force-html, or when the input file was
          fetched remotely from a server describing it as HTML). This is
          equivalent to the presence of a "BASE" tag in the HTML input file,
          with URL as the value for the "href" attribute.

          For instance, if you specify http://foo/bar/a.html for URL, and
          Wget reads ../baz/b.html from the input file, it would be resolved
          to http://foo/baz/b.html.

      --config=FILE
          Specify the location of a startup file you wish to use instead of
          the default one(s). Use --no-config to disable reading of config
          files.  If both --config and --no-config are given, --no-config is
          ignored.

      --rejected-log=logfile
          Logs all URL rejections to logfile as comma separated values.  The
          values include the reason of rejection, the URL and the parent URL
          it was found in.

    Download Options
      --bind-address=ADDRESS
          When making client TCP/IP connections, bind to ADDRESS on the
          local machine.  ADDRESS may be specified as a hostname or IP
          address.  This option can be useful if your machine is bound to
          multiple IPs.

      --bind-dns-address=ADDRESS
          [libcares only] This address overrides the route for DNS requests.
          If you ever need to circumvent the standard settings from
          /etc/resolv.conf, this option together with --dns-servers is your
          friend.  ADDRESS must be specified either as IPv4 or IPv6 address.
          Wget needs to be built with libcares for this option to be
          available.



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 WGET(1)                       GNU Wget 1.19.5                       WGET(1)
 GNU Wget                                                           GNU Wget

                                 2018-05-09



      --dns-servers=ADDRESSES
          [libcares only] The given address(es) override the standard
          nameserver addresses,  e.g. as configured in /etc/resolv.conf.
          ADDRESSES may be specified either as IPv4 or IPv6 addresses,
          comma-separated.  Wget needs to be built with libcares for this
          option to be available.

      -t number
      --tries=number
          Set number of tries to number. Specify 0 or inf for infinite
          retrying.  The default is to retry 20 times, with the exception of
          fatal errors like "connection refused" or "not found" (404), which
          are not retried.

      -O file
      --output-document=file
          The documents will not be written to the appropriate files, but
          all will be concatenated together and written to file.  If - is
          used as file, documents will be printed to standard output,
          disabling link conversion.  (Use ./- to print to a file literally
          named -.)

          Use of -O is not intended to mean simply "use the name file
          instead of the one in the URL;" rather, it is analogous to shell
          redirection: wget -O file http://foo is intended to work like wget
          -O - http://foo > file; file will be truncated immediately, and
          all downloaded content will be written there.

          For this reason, -N (for timestamp-checking) is not supported in
          combination with -O: since file is always newly created, it will
          always have a very new timestamp. A warning will be issued if this
          combination is used.

          Similarly, using -r or -p with -O may not work as you expect: Wget
          won't just download the first file to file and then download the
          rest to their normal names: all downloaded content will be placed
          in file. This was disabled in version 1.11, but has been
          reinstated (with a warning) in 1.11.2, as there are some cases
          where this behavior can actually have some use.

          A combination with -nc is only accepted if the given output file
          does not exist.

          Note that a combination with -k is only permitted when downloading
          a single document, as in that case it will just convert all
          relative URIs to external ones; -k makes no sense for multiple
          URIs when they're all being downloaded to a single file; -k can be
          used only when the output is a regular file.




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 WGET(1)                       GNU Wget 1.19.5                       WGET(1)
 GNU Wget                                                           GNU Wget

                                 2018-05-09



      -nc
      --no-clobber
          If a file is downloaded more than once in the same directory,
          Wget's behavior depends on a few options, including -nc.  In
          certain cases, the local file will be clobbered, or overwritten,
          upon repeated download.  In other cases it will be preserved.

          When running Wget without -N, -nc, -r, or -p, downloading the same
          file in the same directory will result in the original copy of
          file being preserved and the second copy being named file.1.  If
          that file is downloaded yet again, the third copy will be named
          file.2, and so on.  (This is also the behavior with -nd, even if
          -r or -p are in effect.)  When -nc is specified, this behavior is
          suppressed, and Wget will refuse to download newer copies of file.
          Therefore, ""no-clobber"" is actually a misnomer in this
          mode---it's not clobbering that's prevented (as the numeric
          suffixes were already preventing clobbering), but rather the
          multiple version saving that's prevented.

          When running Wget with -r or -p, but without -N, -nd, or -nc, re-
          downloading a file will result in the new copy simply overwriting
          the old.  Adding -nc will prevent this behavior, instead causing
          the original version to be preserved and any newer copies on the
          server to be ignored.

          When running Wget with -N, with or without -r or -p, the decision
          as to whether or not to download a newer copy of a file depends on
          the local and remote timestamp and size of the file.  -nc may not
          be specified at the same time as -N.

          A combination with -O/--output-document is only accepted if the
          given output file does not exist.

          Note that when -nc is specified, files with the suffixes .html or
          .htm will be loaded from the local disk and parsed as if they had
          been retrieved from the Web.

      --backups=backups
          Before (over)writing a file, back up an existing file by adding a
          .1 suffix (_1 on VMS) to the file name.  Such backup files are
          rotated to .2, .3, and so on, up to backups (and lost beyond
          that).

      --no-netrc
          Do not try to obtain credentials from .netrc file. By default
          .netrc file is searched for credentials in case none have been
          passed on command line and authentication is required.

      -c



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 GNU Wget                                                           GNU Wget

                                 2018-05-09



      --continue
          Continue getting a partially-downloaded file.  This is useful when
          you want to finish up a download started by a previous instance of
          Wget, or by another program.  For instance:

                  wget -c ftp://sunsite.doc.ic.ac.uk/ls-lR.Z

          If there is a file named ls-lR.Z in the current directory, Wget
          will assume that it is the first portion of the remote file, and
          will ask the server to continue the retrieval from an offset equal
          to the length of the local file.

          Note that you don't need to specify this option if you just want
          the current invocation of Wget to retry downloading a file should
          the connection be lost midway through.  This is the default
          behavior.  -c only affects resumption of downloads started prior
          to this invocation of Wget, and whose local files are still
          sitting around.

          Without -c, the previous example would just download the remote
          file to ls-lR.Z.1, leaving the truncated ls-lR.Z file alone.

          If you use -c on a non-empty file, and the server does not support
          continued downloading, Wget will restart the download from scratch
          and overwrite the existing file entirely.

          Beginning with Wget 1.7, if you use -c on a file which is of equal
          size as the one on the server, Wget will refuse to download the
          file and print an explanatory message.  The same happens when the
          file is smaller on the server than locally (presumably because it
          was changed on the server since your last download
          attempt)---because "continuing" is not meaningful, no download
          occurs.

          On the other side of the coin, while using -c, any file that's
          bigger on the server than locally will be considered an incomplete
          download and only "(length(remote) - length(local))" bytes will be
          downloaded and tacked onto the end of the local file.  This
          behavior can be desirable in certain cases---for instance, you can
          use wget -c to download just the new portion that's been appended
          to a data collection or log file.

          However, if the file is bigger on the server because it's been
          changed, as opposed to just appended to, you'll end up with a
          garbled file.  Wget has no way of verifying that the local file is
          really a valid prefix of the remote file.  You need to be
          especially careful of this when using -c in conjunction with -r,
          since every file will be considered as an "incomplete download"
          candidate.



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 GNU Wget                                                           GNU Wget

                                 2018-05-09



          Another instance where you'll get a garbled file if you try to use
          -c is if you have a lame HTTP proxy that inserts a "transfer
          interrupted" string into the local file.  In the future a
          "rollback" option may be added to deal with this case.

          Note that -c only works with FTP servers and with HTTP servers
          that support the "Range" header.

      --start-pos=OFFSET
          Start downloading at zero-based position OFFSET.  Offset may be
          expressed in bytes, kilobytes with the `k' suffix, or megabytes
          with the `m' suffix, etc.

          --start-pos has higher precedence over --continue.  When
          --start-pos and --continue are both specified, wget will emit a
          warning then proceed as if --continue was absent.

          Server support for continued download is required, otherwise
          --start-pos cannot help.  See -c for details.

      --progress=type
          Select the type of the progress indicator you wish to use.  Legal
          indicators are "dot" and "bar".

          The "bar" indicator is used by default.  It draws an ASCII
          progress bar graphics (a.k.a "thermometer" display) indicating the
          status of retrieval.  If the output is not a TTY, the "dot" bar
          will be used by default.

          Use --progress=dot to switch to the "dot" display.  It traces the
          retrieval by printing dots on the screen, each dot representing a
          fixed amount of downloaded data.

          The progress type can also take one or more parameters.  The
          parameters vary based on the type selected.  Parameters to type
          are passed by appending them to the type sperated by a colon (:)
          like this: --progress=type:parameter1:parameter2.

          When using the dotted retrieval, you may set the style by
          specifying the type as dot:style.  Different styles assign
          different meaning to one dot.  With the "default" style each dot
          represents 1K, there are ten dots in a cluster and 50 dots in a
          line.  The "binary" style has a more "computer"-like
          orientation---8K dots, 16-dots clusters and 48 dots per line
          (which makes for 384K lines).  The "mega" style is suitable for
          downloading large files---each dot represents 64K retrieved, there
          are eight dots in a cluster, and 48 dots on each line (so each
          line contains 3M).  If "mega" is not enough then you can use the
          "giga" style---each dot represents 1M retrieved, there are eight



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 GNU Wget                                                           GNU Wget

                                 2018-05-09



          dots in a cluster, and 32 dots on each line (so each line contains
          32M).

          With --progress=bar, there are currently two possible parameters,
          force and noscroll.

          When the output is not a TTY, the progress bar always falls back
          to "dot", even if --progress=bar was passed to Wget during
          invocation. This behaviour can be overridden and the "bar" output
          forced by using the "force" parameter as --progress=bar:force.

          By default, the bar style progress bar scroll the name of the file
          from left to right for the file being downloaded if the filename
          exceeds the maximum length allotted for its display.  In certain
          cases, such as with --progress=bar:force, one may not want the
          scrolling filename in the progress bar.  By passing the "noscroll"
          parameter, Wget can be forced to display as much of the filename
          as possible without scrolling through it.

          Note that you can set the default style using the "progress"
          command in .wgetrc.  That setting may be overridden from the
          command line.  For example, to force the bar output without
          scrolling, use --progress=bar:force:noscroll.

      --show-progress
          Force wget to display the progress bar in any verbosity.

          By default, wget only displays the progress bar in verbose mode.
          One may however, want wget to display the progress bar on screen
          in conjunction with any other verbosity modes like --no-verbose or
          --quiet.  This is often a desired a property when invoking wget to
          download several small/large files.  In such a case, wget could
          simply be invoked with this parameter to get a much cleaner output
          on the screen.

          This option will also force the progress bar to be printed to
          stderr when used alongside the --logfile option.

      -N
      --timestamping
          Turn on time-stamping.

      --no-if-modified-since
          Do not send If-Modified-Since header in -N mode. Send preliminary
          HEAD request instead. This has only effect in -N mode.

      --no-use-server-timestamps
          Don't set the local file's timestamp by the one on the server.




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 GNU Wget                                                           GNU Wget

                                 2018-05-09



          By default, when a file is downloaded, its timestamps are set to
          match those from the remote file. This allows the use of
          --timestamping on subsequent invocations of wget. However, it is
          sometimes useful to base the local file's timestamp on when it was
          actually downloaded; for that purpose, the
          --no-use-server-timestamps option has been provided.

      -S
      --server-response
          Print the headers sent by HTTP servers and responses sent by FTP
          servers.

      --spider
          When invoked with this option, Wget will behave as a Web spider,
          which means that it will not download the pages, just check that
          they are there.  For example, you can use Wget to check your
          bookmarks:

                  wget --spider --force-html -i bookmarks.html

          This feature needs much more work for Wget to get close to the
          functionality of real web spiders.

      -T seconds
      --timeout=seconds
          Set the network timeout to seconds seconds.  This is equivalent to
          specifying --dns-timeout, --connect-timeout, and --read-timeout,
          all at the same time.

          When interacting with the network, Wget can check for timeout and
          abort the operation if it takes too long.  This prevents anomalies
          like hanging reads and infinite connects.  The only timeout
          enabled by default is a 900-second read timeout.  Setting a
          timeout to 0 disables it altogether.  Unless you know what you are
          doing, it is best not to change the default timeout settings.

          All timeout-related options accept decimal values, as well as
          subsecond values.  For example, 0.1 seconds is a legal (though
          unwise) choice of timeout.  Subsecond timeouts are useful for
          checking server response times or for testing network latency.

      --dns-timeout=seconds
          Set the DNS lookup timeout to seconds seconds.  DNS lookups that
          don't complete within the specified time will fail.  By default,
          there is no timeout on DNS lookups, other than that implemented by
          system libraries.

      --connect-timeout=seconds
          Set the connect timeout to seconds seconds.  TCP connections that



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                                 2018-05-09



          take longer to establish will be aborted.  By default, there is no
          connect timeout, other than that implemented by system libraries.

      --read-timeout=seconds
          Set the read (and write) timeout to seconds seconds.  The "time"
          of this timeout refers to idle time: if, at any point in the
          download, no data is received for more than the specified number
          of seconds, reading fails and the download is restarted.  This
          option does not directly affect the duration of the entire
          download.

          Of course, the remote server may choose to terminate the
          connection sooner than this option requires.  The default read
          timeout is 900 seconds.

      --limit-rate=amount
          Limit the download speed to amount bytes per second.  Amount may
          be expressed in bytes, kilobytes with the k suffix, or megabytes
          with the m suffix.  For example, --limit-rate=20k will limit the
          retrieval rate to 20KB/s.  This is useful when, for whatever
          reason, you don't want Wget to consume the entire available
          bandwidth.

          This option allows the use of decimal numbers, usually in
          conjunction with power suffixes; for example, --limit-rate=2.5k is
          a legal value.

          Note that Wget implements the limiting by sleeping the appropriate
          amount of time after a network read that took less time than
          specified by the rate.  Eventually this strategy causes the TCP
          transfer to slow down to approximately the specified rate.
          However, it may take some time for this balance to be achieved, so
          don't be surprised if limiting the rate doesn't work well with
          very small files.

      -w seconds
      --wait=seconds
          Wait the specified number of seconds between the retrievals.  Use
          of this option is recommended, as it lightens the server load by
          making the requests less frequent.  Instead of in seconds, the
          time can be specified in minutes using the "m" suffix, in hours
          using "h" suffix, or in days using "d" suffix.

          Specifying a large value for this option is useful if the network
          or the destination host is down, so that Wget can wait long enough
          to reasonably expect the network error to be fixed before the
          retry.  The waiting interval specified by this function is
          influenced by "--random-wait", which see.




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 GNU Wget                                                           GNU Wget

                                 2018-05-09



      --waitretry=seconds
          If you don't want Wget to wait between every retrieval, but only
          between retries of failed downloads, you can use this option.
          Wget will use linear backoff, waiting 1 second after the first
          failure on a given file, then waiting 2 seconds after the second
          failure on that file, up to the maximum number of seconds you
          specify.

          By default, Wget will assume a value of 10 seconds.

      --random-wait
          Some web sites may perform log analysis to identify retrieval
          programs such as Wget by looking for statistically significant
          similarities in the time between requests. This option causes the
          time between requests to vary between 0.5 and 1.5 * wait seconds,
          where wait was specified using the --wait option, in order to mask
          Wget's presence from such analysis.

          A 2001 article in a publication devoted to development on a
          popular consumer platform provided code to perform this analysis
          on the fly.  Its author suggested blocking at the class C address
          level to ensure automated retrieval programs were blocked despite
          changing DHCP-supplied addresses.

          The --random-wait option was inspired by this ill-advised
          recommendation to block many unrelated users from a web site due
          to the actions of one.

      --no-proxy
          Don't use proxies, even if the appropriate *_proxy environment
          variable is defined.

      -Q quota
      --quota=quota
          Specify download quota for automatic retrievals.  The value can be
          specified in bytes (default), kilobytes (with k suffix), or
          megabytes (with m suffix).

          Note that quota will never affect downloading a single file.  So
          if you specify wget -Q10k https://example.com/ls-lR.gz, all of the
          ls-lR.gz will be downloaded.  The same goes even when several URLs
          are specified on the command-line.  However, quota is respected
          when retrieving either recursively, or from an input file.  Thus
          you may safely type wget -Q2m -i sites---download will be aborted
          when the quota is exceeded.

          Setting quota to 0 or to inf unlimits the download quota.

      --no-dns-cache



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 WGET(1)                       GNU Wget 1.19.5                       WGET(1)
 GNU Wget                                                           GNU Wget

                                 2018-05-09



          Turn off caching of DNS lookups.  Normally, Wget remembers the IP
          addresses it looked up from DNS so it doesn't have to repeatedly
          contact the DNS server for the same (typically small) set of hosts
          it retrieves from.  This cache exists in memory only; a new Wget
          run will contact DNS again.

          However, it has been reported that in some situations it is not
          desirable to cache host names, even for the duration of a short-
          running application like Wget.  With this option Wget issues a new
          DNS lookup (more precisely, a new call to "gethostbyname" or
          "getaddrinfo") each time it makes a new connection.  Please note
          that this option will not affect caching that might be performed
          by the resolving library or by an external caching layer, such as
          NSCD.

          If you don't understand exactly what this option does, you
          probably won't need it.

      --restrict-file-names=modes
          Change which characters found in remote URLs must be escaped
          during generation of local filenames.  Characters that are
          restricted by this option are escaped, i.e. replaced with %HH,
          where HH is the hexadecimal number that corresponds to the
          restricted character. This option may also be used to force all
          alphabetical cases to be either lower- or uppercase.

          By default, Wget escapes the characters that are not valid or safe
          as part of file names on your operating system, as well as control
          characters that are typically unprintable.  This option is useful
          for changing these defaults, perhaps because you are downloading
          to a non-native partition, or because you want to disable escaping
          of the control characters, or you want to further restrict
          characters to only those in the ASCII range of values.

          The modes are a comma-separated set of text values. The acceptable
          values are unix, windows, nocontrol, ascii, lowercase, and
          uppercase. The values unix and windows are mutually exclusive (one
          will override the other), as are lowercase and uppercase. Those
          last are special cases, as they do not change the set of
          characters that would be escaped, but rather force local file
          paths to be converted either to lower- or uppercase.

          When "unix" is specified, Wget escapes the character / and the
          control characters in the ranges 0--31 and 128--159.  This is the
          default on Unix-like operating systems.

          When "windows" is given, Wget escapes the characters \, |, /, :,
          ?, ", *, <, >, and the control characters in the ranges 0--31 and
          128--159.  In addition to this, Wget in Windows mode uses +



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                                 2018-05-09



          instead of : to separate host and port in local file names, and
          uses @ instead of ? to separate the query portion of the file name
          from the rest.  Therefore, a URL that would be saved as
          www.xemacs.org:4300/search.pl?input=blah in Unix mode would be
          saved as www.xemacs.org+4300/search.pl@input=blah in Windows mode.
          This mode is the default on Windows.

          If you specify nocontrol, then the escaping of the control
          characters is also switched off. This option may make sense when
          you are downloading URLs whose names contain UTF-8 characters, on
          a system which can save and display filenames in UTF-8 (some
          possible byte values used in UTF-8 byte sequences fall in the
          range of values designated by Wget as "controls").

          The ascii mode is used to specify that any bytes whose values are
          outside the range of ASCII characters (that is, greater than 127)
          shall be escaped. This can be useful when saving filenames whose
          encoding does not match the one used locally.

      -4
      --inet4-only
      -6
      --inet6-only
          Force connecting to IPv4 or IPv6 addresses.  With --inet4-only or
          -4, Wget will only connect to IPv4 hosts, ignoring AAAA records in
          DNS, and refusing to connect to IPv6 addresses specified in URLs.
          Conversely, with --inet6-only or -6, Wget will only connect to
          IPv6 hosts and ignore A records and IPv4 addresses.

          Neither options should be needed normally.  By default, an
          IPv6-aware Wget will use the address family specified by the
          host's DNS record.  If the DNS responds with both IPv4 and IPv6
          addresses, Wget will try them in sequence until it finds one it
          can connect to.  (Also see "--prefer-family" option described
          below.)

          These options can be used to deliberately force the use of IPv4 or
          IPv6 address families on dual family systems, usually to aid
          debugging or to deal with broken network configuration.  Only one
          of --inet6-only and --inet4-only may be specified at the same
          time.  Neither option is available in Wget compiled without IPv6
          support.

      --prefer-family=none/IPv4/IPv6
          When given a choice of several addresses, connect to the addresses
          with specified address family first.  The address order returned
          by DNS is used without change by default.

          This avoids spurious errors and connect attempts when accessing



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                                 2018-05-09



          hosts that resolve to both IPv6 and IPv4 addresses from IPv4
          networks.  For example, www.kame.net resolves to
          2001:200:0:8002:203:47ff:fea5:3085 and to 203.178.141.194.  When
          the preferred family is "IPv4", the IPv4 address is used first;
          when the preferred family is "IPv6", the IPv6 address is used
          first; if the specified value is "none", the address order
          returned by DNS is used without change.

          Unlike -4 and -6, this option doesn't inhibit access to any
          address family, it only changes the order in which the addresses
          are accessed.  Also note that the reordering performed by this
          option is stable---it doesn't affect order of addresses of the
          same family.  That is, the relative order of all IPv4 addresses
          and of all IPv6 addresses remains intact in all cases.

      --retry-connrefused
          Consider "connection refused" a transient error and try again.
          Normally Wget gives up on a URL when it is unable to connect to
          the site because failure to connect is taken as a sign that the
          server is not running at all and that retries would not help.
          This option is for mirroring unreliable sites whose servers tend
          to disappear for short periods of time.

      --user=user
      --password=password
          Specify the username user and password password for both FTP and
          HTTP file retrieval.  These parameters can be overridden using the
          --ftp-user and --ftp-password options for FTP connections and the
          --http-user and --http-password options for HTTP connections.

      --ask-password
          Prompt for a password for each connection established. Cannot be
          specified when --password is being used, because they are mutually
          exclusive.

      --use-askpass=command
          Prompt for a user and password using the specified command.  If no
          command is specified then the command in the environment variable
          WGET_ASKPASS is used.  If WGET_ASKPASS is not set then the command
          in the environment variable SSH_ASKPASS is used.

          You can set the default command for use-askpass in the .wgetrc.
          That setting may be overridden from the command line.

      --no-iri
          Turn off internationalized URI (IRI) support. Use --iri to turn it
          on. IRI support is activated by default.

          You can set the default state of IRI support using the "iri"



                                   - 16 -           Formatted:  May 23, 2018






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                                 2018-05-09



          command in .wgetrc. That setting may be overridden from the
          command line.

      --local-encoding=encoding
          Force Wget to use encoding as the default system encoding. That
          affects how Wget converts URLs specified as arguments from locale
          to UTF-8 for IRI support.

          Wget use the function "nl_langinfo()" and then the "CHARSET"
          environment variable to get the locale. If it fails, ASCII is
          used.

          You can set the default local encoding using the "local_encoding"
          command in .wgetrc. That setting may be overridden from the
          command line.

      --remote-encoding=encoding
          Force Wget to use encoding as the default remote server encoding.
          That affects how Wget converts URIs found in files from remote
          encoding to UTF-8 during a recursive fetch. This options is only
          useful for IRI support, for the interpretation of non-ASCII
          characters.

          For HTTP, remote encoding can be found in HTTP "Content-Type"
          header and in HTML "Content-Type http-equiv" meta tag.

          You can set the default encoding using the "remoteencoding"
          command in .wgetrc. That setting may be overridden from the
          command line.

      --unlink
          Force Wget to unlink file instead of clobbering existing file.
          This option is useful for downloading to the directory with
          hardlinks.

    Directory Options
      -nd
      --no-directories
          Do not create a hierarchy of directories when retrieving
          recursively.  With this option turned on, all files will get saved
          to the current directory, without clobbering (if a name shows up
          more than once, the filenames will get extensions .n).

      -x
      --force-directories
          The opposite of -nd---create a hierarchy of directories, even if
          one would not have been created otherwise.  E.g. wget -x
          http://fly.srk.fer.hr/robots.txt will save the downloaded file to
          fly.srk.fer.hr/robots.txt.



                                   - 17 -           Formatted:  May 23, 2018






 WGET(1)                       GNU Wget 1.19.5                       WGET(1)
 GNU Wget                                                           GNU Wget

                                 2018-05-09



      -nH
      --no-host-directories
          Disable generation of host-prefixed directories.  By default,
          invoking Wget with -r http://fly.srk.fer.hr/ will create a
          structure of directories beginning with fly.srk.fer.hr/.  This
          option disables such behavior.

      --protocol-directories
          Use the protocol name as a directory component of local file
          names.  For example, with this option, wget -r http://host will
          save to http/host/... rather than just to host/....

      --cut-dirs=number
          Ignore number directory components.  This is useful for getting a
          fine-grained control over the directory where recursive retrieval
          will be saved.

          Take, for example, the directory at
          ftp://ftp.xemacs.org/pub/xemacs/.  If you retrieve it with -r, it
          will be saved locally under ftp.xemacs.org/pub/xemacs/.  While the
          -nH option can remove the ftp.xemacs.org/ part, you are still
          stuck with pub/xemacs.  This is where --cut-dirs comes in handy;
          it makes Wget not "see" number remote directory components.  Here
          are several examples of how --cut-dirs option works.

                  No options        -> ftp.xemacs.org/pub/xemacs/
                  -nH               -> pub/xemacs/
                  -nH --cut-dirs=1  -> xemacs/
                  -nH --cut-dirs=2  -> .

                  --cut-dirs=1      -> ftp.xemacs.org/xemacs/
                  ...

          If you just want to get rid of the directory structure, this
          option is similar to a combination of -nd and -P.  However, unlike
          -nd, --cut-dirs does not lose with subdirectories---for instance,
          with -nH --cut-dirs=1, a beta/ subdirectory will be placed to
          xemacs/beta, as one would expect.

      -P prefix
      --directory-prefix=prefix
          Set directory prefix to prefix.  The directory prefix is the
          directory where all other files and subdirectories will be saved
          to, i.e. the top of the retrieval tree.  The default is . (the
          current directory).

    HTTP Options
      --default-page=name
          Use name as the default file name when it isn't known (i.e., for



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                                 2018-05-09



          URLs that end in a slash), instead of index.html.

      -E
      --adjust-extension
          If a file of type application/xhtml+xml or text/html is downloaded
          and the URL does not end with the regexp \.[Hh][Tt][Mm][Ll]?, this
          option will cause the suffix .html to be appended to the local
          filename.  This is useful, for instance, when you're mirroring a
          remote site that uses .asp pages, but you want the mirrored pages
          to be viewable on your stock Apache server.  Another good use for
          this is when you're downloading CGI-generated materials.  A URL
          like http://site.com/article.cgi?25 will be saved as
          article.cgi?25.html.

          Note that filenames changed in this way will be re-downloaded
          every time you re-mirror a site, because Wget can't tell that the
          local X.html file corresponds to remote URL X (since it doesn't
          yet know that the URL produces output of type text/html or
          application/xhtml+xml.

          As of version 1.12, Wget will also ensure that any downloaded
          files of type text/css end in the suffix .css, and the option was
          renamed from --html-extension, to better reflect its new behavior.
          The old option name is still acceptable, but should now be
          considered deprecated.

          As of version 1.19.2, Wget will also ensure that any downloaded
          files with a "Content-Encoding" of br, compress, deflate or gzip
          end in the suffix .br, .Z, .zlib and .gz respectively.

          At some point in the future, this option may well be expanded to
          include suffixes for other types of content, including content
          types that are not parsed by Wget.

      --http-user=user
      --http-password=password
          Specify the username user and password password on an HTTP server.
          According to the type of the challenge, Wget will encode them
          using either the "basic" (insecure), the "digest", or the Windows
          "NTLM" authentication scheme.

          Another way to specify username and password is in the URL itself.
          Either method reveals your password to anyone who bothers to run
          "ps".  To prevent the passwords from being seen, use the
          --use-askpass or store them in .wgetrc or .netrc, and make sure to
          protect those files from other users with "chmod".  If the
          passwords are really important, do not leave them lying in those
          files either---edit the files and delete them after Wget has
          started the download.



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 GNU Wget                                                           GNU Wget

                                 2018-05-09



      --no-http-keep-alive
          Turn off the "keep-alive" feature for HTTP downloads.  Normally,
          Wget asks the server to keep the connection open so that, when you
          download more than one document from the same server, they get
          transferred over the same TCP connection.  This saves time and at
          the same time reduces the load on the server.

          This option is useful when, for some reason, persistent (keep-
          alive) connections don't work for you, for example due to a server
          bug or due to the inability of server-side scripts to cope with
          the connections.

      --no-cache
          Disable server-side cache.  In this case, Wget will send the
          remote server an appropriate directive (Pragma: no-cache) to get
          the file from the remote service, rather than returning the cached
          version.  This is especially useful for retrieving and flushing
          out-of-date documents on proxy servers.

          Caching is allowed by default.

      --no-cookies
          Disable the use of cookies.  Cookies are a mechanism for
          maintaining server-side state.  The server sends the client a
          cookie using the "Set-Cookie" header, and the client responds with
          the same cookie upon further requests.  Since cookies allow the
          server owners to keep track of visitors and for sites to exchange
          this information, some consider them a breach of privacy.  The
          default is to use cookies; however, storing cookies is not on by
          default.

      --load-cookies file
          Load cookies from file before the first HTTP retrieval.  file is a
          textual file in the format originally used by Netscape's
          cookies.txt file.

          You will typically use this option when mirroring sites that
          require that you be logged in to access some or all of their
          content.  The login process typically works by the web server
          issuing an HTTP cookie upon receiving and verifying your
          credentials.  The cookie is then resent by the browser when
          accessing that part of the site, and so proves your identity.

          Mirroring such a site requires Wget to send the same cookies your
          browser sends when communicating with the site.  This is achieved
          by --load-cookies---simply point Wget to the location of the
          cookies.txt file, and it will send the same cookies your browser
          would send in the same situation.  Different browsers keep textual
          cookie files in different locations:



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 GNU Wget                                                           GNU Wget

                                 2018-05-09



          "Netscape 4.x."
              The cookies are in ~/.netscape/cookies.txt.

          "Mozilla and Netscape 6.x."
              Mozilla's cookie file is also named cookies.txt, located
              somewhere under ~/.mozilla, in the directory of your profile.
              The full path usually ends up looking somewhat like
              ~/.mozilla/default/some-weird-string/cookies.txt.

          "Internet Explorer."
              You can produce a cookie file Wget can use by using the File
              menu, Import and Export, Export Cookies.  This has been tested
              with Internet Explorer 5; it is not guaranteed to work with
              earlier versions.

          "Other browsers."
              If you are using a different browser to create your cookies,
              --load-cookies will only work if you can locate or produce a
              cookie file in the Netscape format that Wget expects.

          If you cannot use --load-cookies, there might still be an
          alternative.  If your browser supports a "cookie manager", you can
          use it to view the cookies used when accessing the site you're
          mirroring.  Write down the name and value of the cookie, and
          manually instruct Wget to send those cookies, bypassing the
          "official" cookie support:

                  wget --no-cookies --header "Cookie: <name>=<value>"

      --save-cookies file
          Save cookies to file before exiting.  This will not save cookies
          that have expired or that have no expiry time (so-called "session
          cookies"), but also see --keep-session-cookies.

      --keep-session-cookies
          When specified, causes --save-cookies to also save session
          cookies.  Session cookies are normally not saved because they are
          meant to be kept in memory and forgotten when you exit the
          browser.  Saving them is useful on sites that require you to log
          in or to visit the home page before you can access some pages.
          With this option, multiple Wget runs are considered a single
          browser session as far as the site is concerned.

          Since the cookie file format does not normally carry session
          cookies, Wget marks them with an expiry timestamp of 0.  Wget's
          --load-cookies recognizes those as session cookies, but it might
          confuse other browsers.  Also note that cookies so loaded will be
          treated as other session cookies, which means that if you want
          --save-cookies to preserve them again, you must use



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 GNU Wget                                                           GNU Wget

                                 2018-05-09



          --keep-session-cookies again.

      --ignore-length
          Unfortunately, some HTTP servers (CGI programs, to be more
          precise) send out bogus "Content-Length" headers, which makes Wget
          go wild, as it thinks not all the document was retrieved.  You can
          spot this syndrome if Wget retries getting the same document again
          and again, each time claiming that the (otherwise normal)
          connection has closed on the very same byte.

          With this option, Wget will ignore the "Content-Length"
          header---as if it never existed.

      --header=header-line
          Send header-line along with the rest of the headers in each HTTP
          request.  The supplied header is sent as-is, which means it must
          contain name and value separated by colon, and must not contain
          newlines.

          You may define more than one additional header by specifying
          --header more than once.

                  wget --header='Accept-Charset: iso-8859-2' \
                       --header='Accept-Language: hr'        \
                         http://fly.srk.fer.hr/

          Specification of an empty string as the header value will clear
          all previous user-defined headers.

          As of Wget 1.10, this option can be used to override headers
          otherwise generated automatically.  This example instructs Wget to
          connect to localhost, but to specify foo.bar in the "Host" header:

                  wget --header="Host: foo.bar" http://localhost/

          In versions of Wget prior to 1.10 such use of --header caused
          sending of duplicate headers.

      --compression=type
          Choose the type of compression to be used.  Legal values are auto,
          gzip and none.

          If auto or gzip are specified, Wget asks the server to compress
          the file using the gzip compression format. If the server
          compresses the file and responds with the "Content-Encoding"
          header field set appropriately, the file will be decompressed
          automatically.

          If none is specified, wget will not ask the server to compress the



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                                 2018-05-09



          file and will not decompress any server responses. This is the
          default.

          Compression support is currently experimental. In case it is
          turned on, please report any bugs to "bug-wget@gnu.org".

      --max-redirect=number
          Specifies the maximum number of redirections to follow for a
          resource.  The default is 20, which is usually far more than
          necessary. However, on those occasions where you want to allow
          more (or fewer), this is the option to use.

      --proxy-user=user
      --proxy-password=password
          Specify the username user and password password for authentication
          on a proxy server.  Wget will encode them using the "basic"
          authentication scheme.

          Security considerations similar to those with --http-password
          pertain here as well.

      --referer=url
          Include `Referer: url' header in HTTP request.  Useful for
          retrieving documents with server-side processing that assume they
          are always being retrieved by interactive web browsers and only
          come out properly when Referer is set to one of the pages that
          point to them.

      --save-headers
          Save the headers sent by the HTTP server to the file, preceding
          the actual contents, with an empty line as the separator.

      -U agent-string
      --user-agent=agent-string
          Identify as agent-string to the HTTP server.

          The HTTP protocol allows the clients to identify themselves using
          a "User-Agent" header field.  This enables distinguishing the WWW
          software, usually for statistical purposes or for tracing of
          protocol violations.  Wget normally identifies as Wget/version,
          version being the current version number of Wget.

          However, some sites have been known to impose the policy of
          tailoring the output according to the "User-Agent"-supplied
          information.  While this is not such a bad idea in theory, it has
          been abused by servers denying information to clients other than
          (historically) Netscape or, more frequently, Microsoft Internet
          Explorer.  This option allows you to change the "User-Agent" line
          issued by Wget.  Use of this option is discouraged, unless you



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                                 2018-05-09



          really know what you are doing.

          Specifying empty user agent with --user-agent="" instructs Wget
          not to send the "User-Agent" header in HTTP requests.

      --post-data=string
      --post-file=file
          Use POST as the method for all HTTP requests and send the
          specified data in the request body.  --post-data sends string as
          data, whereas --post-file sends the contents of file.  Other than
          that, they work in exactly the same way. In particular, they both
          expect content of the form "key1=value1&key2=value2", with
          percent-encoding for special characters; the only difference is
          that one expects its content as a command-line parameter and the
          other accepts its content from a file. In particular, --post-file
          is not for transmitting files as form attachments: those must
          appear as "key=value" data (with appropriate percent-coding) just
          like everything else. Wget does not currently support
          "multipart/form-data" for transmitting POST data; only
          "application/x-www-form-urlencoded". Only one of --post-data and
          --post-file should be specified.

          Please note that wget does not require the content to be of the
          form "key1=value1&key2=value2", and neither does it test for it.
          Wget will simply transmit whatever data is provided to it. Most
          servers however expect the POST data to be in the above format
          when processing HTML Forms.

          When sending a POST request using the --post-file option, Wget
          treats the file as a binary file and will send every character in
          the POST request without stripping trailing newline or formfeed
          characters. Any other control characters in the text will also be
          sent as-is in the POST request.

          Please be aware that Wget needs to know the size of the POST data
          in advance.  Therefore the argument to "--post-file" must be a
          regular file; specifying a FIFO or something like /dev/stdin won't
          work.  It's not quite clear how to work around this limitation
          inherent in HTTP/1.0.  Although HTTP/1.1 introduces chunked
          transfer that doesn't require knowing the request length in
          advance, a client can't use chunked unless it knows it's talking
          to an HTTP/1.1 server.  And it can't know that until it receives a
          response, which in turn requires the request to have been
          completed -- a chicken-and-egg problem.

          Note: As of version 1.15 if Wget is redirected after the POST
          request is completed, its behaviour will depend on the response
          code returned by the server.  In case of a 301 Moved Permanently,
          302 Moved Temporarily or 307 Temporary Redirect, Wget will, in



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                                 2018-05-09



          accordance with RFC2616, continue to send a POST request.  In case
          a server wants the client to change the Request method upon
          redirection, it should send a 303 See Other response code.

          This example shows how to log in to a server using POST and then
          proceed to download the desired pages, presumably only accessible
          to authorized users:

                  # Log in to the server.  This can be done only once.
                  wget --save-cookies cookies.txt \
                       --post-data 'user=foo&password=bar' \
                       http://example.com/auth.php

                  # Now grab the page or pages we care about.
                  wget --load-cookies cookies.txt \
                       -p http://example.com/interesting/article.php

          If the server is using session cookies to track user
          authentication, the above will not work because --save-cookies
          will not save them (and neither will browsers) and the cookies.txt
          file will be empty.  In that case use --keep-session-cookies along
          with --save-cookies to force saving of session cookies.

      --method=HTTP-Method
          For the purpose of RESTful scripting, Wget allows sending of other
          HTTP Methods without the need to explicitly set them using
          --header=Header-Line.  Wget will use whatever string is passed to
          it after --method as the HTTP Method to the server.

      --body-data=Data-String
      --body-file=Data-File
          Must be set when additional data needs to be sent to the server
          along with the Method specified using --method.  --body-data sends
          string as data, whereas --body-file sends the contents of file.
          Other than that, they work in exactly the same way.

          Currently, --body-file is not for transmitting files as a whole.
          Wget does not currently support "multipart/form-data" for
          transmitting data; only "application/x-www-form-urlencoded". In
          the future, this may be changed so that wget sends the --body-file
          as a complete file instead of sending its contents to the server.
          Please be aware that Wget needs to know the contents of BODY Data
          in advance, and hence the argument to --body-file should be a
          regular file. See --post-file for a more detailed explanation.
          Only one of --body-data and --body-file should be specified.

          If Wget is redirected after the request is completed, Wget will
          suspend the current method and send a GET request till the
          redirection is completed.  This is true for all redirection



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          response codes except 307 Temporary Redirect which is used to
          explicitly specify that the request method should not change.
          Another exception is when the method is set to "POST", in which
          case the redirection rules specified under --post-data are
          followed.

      --content-disposition
          If this is set to on, experimental (not fully-functional) support
          for "Content-Disposition" headers is enabled. This can currently
          result in extra round-trips to the server for a "HEAD" request,
          and is known to suffer from a few bugs, which is why it is not
          currently enabled by default.

          This option is useful for some file-downloading CGI programs that
          use "Content-Disposition" headers to describe what the name of a
          downloaded file should be.

          When combined with --metalink-over-http and --trust-server-names,
          a Content-Type: application/metalink4+xml file is named using the
          "Content-Disposition" filename field, if available.

      --content-on-error
          If this is set to on, wget will not skip the content when the
          server responds with a http status code that indicates error.

      --trust-server-names
          If this is set, on a redirect, the local file name will be based
          on the redirection URL.  By default the local file name is based
          on the original URL.  When doing recursive retrieving this can be
          helpful because in many web sites redirected URLs correspond to an
          underlying file structure, while link URLs do not.

      --auth-no-challenge
          If this option is given, Wget will send Basic HTTP authentication
          information (plaintext username and password) for all requests,
          just like Wget 1.10.2 and prior did by default.

          Use of this option is not recommended, and is intended only to
          support some few obscure servers, which never send HTTP
          authentication challenges, but accept unsolicited auth info, say,
          in addition to form-based authentication.

      --retry-on-http-error=code[,code,...]
          Consider given HTTP response codes as non-fatal, transient errors.
          Supply a comma-separated list of 3-digit HTTP response codes as
          argument. Useful to work around special circumstances where
          retries are required, but the server responds with an error code
          normally not retried by Wget. Such errors might be 503 (Service
          Unavailable) and 429 (Too Many Requests). Retries enabled by this



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          option are performed subject to the normal retry timing and retry
          count limitations of Wget.

          Using this option is intended to support special use cases only
          and is generally not recommended, as it can force retries even in
          cases where the server is actually trying to decrease its load.
          Please use wisely and only if you know what you are doing.

    HTTPS (SSL/TLS) Options
      To support encrypted HTTP (HTTPS) downloads, Wget must be compiled
      with an external SSL library. The current default is GnuTLS.  In
      addition, Wget also supports HSTS (HTTP Strict Transport Security).
      If Wget is compiled without SSL support, none of these options are
      available.

      --secure-protocol=protocol
          Choose the secure protocol to be used.  Legal values are auto,
          SSLv2, SSLv3, TLSv1, TLSv1_1, TLSv1_2 and PFS.  If auto is used,
          the SSL library is given the liberty of choosing the appropriate
          protocol automatically, which is achieved by sending a TLSv1
          greeting. This is the default.

          Specifying SSLv2, SSLv3, TLSv1, TLSv1_1, TLSv1_2 or TLSv1_3 forces
          the use of the corresponding protocol.  This is useful when
          talking to old and buggy SSL server implementations that make it
          hard for the underlying SSL library to choose the correct protocol
          version.  Fortunately, such servers are quite rare.

          Specifying PFS enforces the use of the so-called Perfect Forward
          Security cipher suites. In short, PFS adds security by creating a
          one-time key for each SSL connection. It has a bit more CPU impact
          on client and server.  We use known to be secure ciphers (e.g. no
          MD4) and the TLS protocol. This mode also explicitly excludes
          non-PFS key exchange methods, such as RSA.

      --https-only
          When in recursive mode, only HTTPS links are followed.

      --ciphers
          Set the cipher list string. Typically this string sets the cipher
          suites and other SSL/TLS options that the user wish should be
          used, in a set order of preference (GnuTLS calls it 'priority
          string'). This string will be fed verbatim to the SSL/TLS engine
          (OpenSSL or GnuTLS) and hence its format and syntax is dependant
          on that. Wget will not process or manipulate it in any way. Refer
          to the OpenSSL or GnuTLS documentation for more information.

      --no-check-certificate
          Don't check the server certificate against the available



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          certificate authorities.  Also don't require the URL host name to
          match the common name presented by the certificate.

          As of Wget 1.10, the default is to verify the server's certificate
          against the recognized certificate authorities, breaking the SSL
          handshake and aborting the download if the verification fails.
          Although this provides more secure downloads, it does break
          interoperability with some sites that worked with previous Wget
          versions, particularly those using self-signed, expired, or
          otherwise invalid certificates.  This option forces an "insecure"
          mode of operation that turns the certificate verification errors
          into warnings and allows you to proceed.

          If you encounter "certificate verification" errors or ones saying
          that "common name doesn't match requested host name", you can use
          this option to bypass the verification and proceed with the
          download.  Only use this option if you are otherwise convinced of
          the site's authenticity, or if you really don't care about the
          validity of its certificate.  It is almost always a bad idea not
          to check the certificates when transmitting confidential or
          important data.  For self-signed/internal certificates, you should
          download the certificate and verify against that instead of
          forcing this insecure mode.  If you are really sure of not
          desiring any certificate verification, you can specify
          --check-certificate=quiet to tell wget to not print any warning
          about invalid certificates, albeit in most cases this is the wrong
          thing to do.

      --certificate=file
          Use the client certificate stored in file.  This is needed for
          servers that are configured to require certificates from the
          clients that connect to them.  Normally a certificate is not
          required and this switch is optional.

      --certificate-type=type
          Specify the type of the client certificate.  Legal values are PEM
          (assumed by default) and DER, also known as ASN1.

      --private-key=file
          Read the private key from file.  This allows you to provide the
          private key in a file separate from the certificate.

      --private-key-type=type
          Specify the type of the private key.  Accepted values are PEM (the
          default) and DER.

      --ca-certificate=file
          Use file as the file with the bundle of certificate authorities
          ("CA") to verify the peers.  The certificates must be in PEM



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          format.

          Without this option Wget looks for CA certificates at the system-
          specified locations, chosen at OpenSSL installation time.

      --ca-directory=directory
          Specifies directory containing CA certificates in PEM format.
          Each file contains one CA certificate, and the file name is based
          on a hash value derived from the certificate.  This is achieved by
          processing a certificate directory with the "c_rehash" utility
          supplied with OpenSSL.  Using --ca-directory is more efficient
          than --ca-certificate when many certificates are installed because
          it allows Wget to fetch certificates on demand.

          Without this option Wget looks for CA certificates at the system-
          specified locations, chosen at OpenSSL installation time.

      --crl-file=file
          Specifies a CRL file in file.  This is needed for certificates
          that have been revocated by the CAs.

      --pinnedpubkey=file/hashes
          Tells wget to use the specified public key file (or hashes) to
          verify the peer.  This can be a path to a file which contains a
          single public key in PEM or DER format, or any number of base64
          encoded sha256 hashes preceded by "sha256//" and separated by ";"

          When negotiating a TLS or SSL connection, the server sends a
          certificate indicating its identity. A public key is extracted
          from this certificate and if it does not exactly match the public
          key(s) provided to this option, wget will abort the connection
          before sending or receiving any data.

      --random-file=file
          [OpenSSL and LibreSSL only] Use file as the source of random data
          for seeding the pseudo-random number generator on systems without
          /dev/urandom.

          On such systems the SSL library needs an external source of
          randomness to initialize.  Randomness may be provided by EGD (see
          --egd-file below) or read from an external source specified by the
          user.  If this option is not specified, Wget looks for random data
          in $RANDFILE or, if that is unset, in $HOME/.rnd.

          If you're getting the "Could not seed OpenSSL PRNG; disabling
          SSL." error, you should provide random data using some of the
          methods described above.

      --egd-file=file



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          [OpenSSL only] Use file as the EGD socket.  EGD stands for Entropy
          Gathering Daemon, a user-space program that collects data from
          various unpredictable system sources and makes it available to
          other programs that might need it.  Encryption software, such as
          the SSL library, needs sources of non-repeating randomness to seed
          the random number generator used to produce cryptographically
          strong keys.

          OpenSSL allows the user to specify his own source of entropy using
          the "RAND_FILE" environment variable.  If this variable is unset,
          or if the specified file does not produce enough randomness,
          OpenSSL will read random data from EGD socket specified using this
          option.

          If this option is not specified (and the equivalent startup
          command is not used), EGD is never contacted.  EGD is not needed
          on modern Unix systems that support /dev/urandom.

      --no-hsts
          Wget supports HSTS (HTTP Strict Transport Security, RFC 6797) by
          default.  Use --no-hsts to make Wget act as a non-HSTS-compliant
          UA. As a consequence, Wget would ignore all the
          "Strict-Transport-Security" headers, and would not enforce any
          existing HSTS policy.

      --hsts-file=file
          By default, Wget stores its HSTS database in ~/.wget-hsts.  You
          can use --hsts-file to override this. Wget will use the supplied
          file as the HSTS database. Such file must conform to the correct
          HSTS database format used by Wget. If Wget cannot parse the
          provided file, the behaviour is unspecified.

          The Wget's HSTS database is a plain text file. Each line contains
          an HSTS entry (ie. a site that has issued a
          "Strict-Transport-Security" header and that therefore has
          specified a concrete HSTS policy to be applied). Lines starting
          with a dash ("#") are ignored by Wget. Please note that in spite
          of this convenient human-readability hand-hacking the HSTS
          database is generally not a good idea.

          An HSTS entry line consists of several fields separated by one or
          more whitespace:

          "<hostname> SP [<port>] SP <include subdomains> SP <created> SP
          <max-age>"

          The hostname and port fields indicate the hostname and port to
          which the given HSTS policy applies. The port field may be zero,
          and it will, in most of the cases. That means that the port number



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                                 2018-05-09



          will not be taken into account when deciding whether such HSTS
          policy should be applied on a given request (only the hostname
          will be evaluated). When port is different to zero, both the
          target hostname and the port will be evaluated and the HSTS policy
          will only be applied if both of them match. This feature has been
          included for testing/development purposes only.  The Wget
          testsuite (in testenv/) creates HSTS databases with explicit ports
          with the purpose of ensuring Wget's correct behaviour. Applying
          HSTS policies to ports other than the default ones is discouraged
          by RFC 6797 (see Appendix B "Differences between HSTS Policy and
          Same-Origin Policy"). Thus, this functionality should not be used
          in production environments and port will typically be zero. The
          last three fields do what they are expected to. The field
          include_subdomains can either be 1 or 0 and it signals whether the
          subdomains of the target domain should be part of the given HSTS
          policy as well. The created and max-age fields hold the timestamp
          values of when such entry was created (first seen by Wget) and the
          HSTS-defined value 'max-age', which states how long should that
          HSTS policy remain active, measured in seconds elapsed since the
          timestamp stored in created. Once that time has passed, that HSTS
          policy will no longer be valid and will eventually be removed from
          the database.

          If you supply your own HSTS database via --hsts-file, be aware
          that Wget may modify the provided file if any change occurs
          between the HSTS policies requested by the remote servers and
          those in the file. When Wget exists, it effectively updates the
          HSTS database by rewriting the database file with the new entries.

          If the supplied file does not exist, Wget will create one. This
          file will contain the new HSTS entries. If no HSTS entries were
          generated (no "Strict-Transport-Security" headers were sent by any
          of the servers) then no file will be created, not even an empty
          one. This behaviour applies to the default database file
          (~/.wget-hsts) as well: it will not be created until some server
          enforces an HSTS policy.

          Care is taken not to override possible changes made by other Wget
          processes at the same time over the HSTS database. Before dumping
          the updated HSTS entries on the file, Wget will re-read it and
          merge the changes.

          Using a custom HSTS database and/or modifying an existing one is
          discouraged.  For more information about the potential security
          threats arised from such practice, see section 14 "Security
          Considerations" of RFC 6797, specially section 14.9 "Creative
          Manipulation of HSTS Policy Store".

      --warc-file=file



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          Use file as the destination WARC file.

      --warc-header=string
          Use string into as the warcinfo record.

      --warc-max-size=size
          Set the maximum size of the WARC files to size.

      --warc-cdx
          Write CDX index files.

      --warc-dedup=file
          Do not store records listed in this CDX file.

      --no-warc-compression
          Do not compress WARC files with GZIP.

      --no-warc-digests
          Do not calculate SHA1 digests.

      --no-warc-keep-log
          Do not store the log file in a WARC record.

      --warc-tempdir=dir
          Specify the location for temporary files created by the WARC
          writer.

    FTP Options
      --ftp-user=user
      --ftp-password=password
          Specify the username user and password password on an FTP server.
          Without this, or the corresponding startup option, the password
          defaults to -wget@, normally used for anonymous FTP.

          Another way to specify username and password is in the URL itself.
          Either method reveals your password to anyone who bothers to run
          "ps".  To prevent the passwords from being seen, store them in
          .wgetrc or .netrc, and make sure to protect those files from other
          users with "chmod".  If the passwords are really important, do not
          leave them lying in those files either---edit the files and delete
          them after Wget has started the download.

      --no-remove-listing
          Don't remove the temporary .listing files generated by FTP
          retrievals.  Normally, these files contain the raw directory
          listings received from FTP servers.  Not removing them can be
          useful for debugging purposes, or when you want to be able to
          easily check on the contents of remote server directories (e.g. to
          verify that a mirror you're running is complete).



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          Note that even though Wget writes to a known filename for this
          file, this is not a security hole in the scenario of a user making
          .listing a symbolic link to /etc/passwd or something and asking
          "root" to run Wget in his or her directory.  Depending on the
          options used, either Wget will refuse to write to .listing, making
          the globbing/recursion/time-stamping operation fail, or the
          symbolic link will be deleted and replaced with the actual
          .listing file, or the listing will be written to a .listing.number
          file.

          Even though this situation isn't a problem, though, "root" should
          never run Wget in a non-trusted user's directory.  A user could do
          something as simple as linking index.html to /etc/passwd and
          asking "root" to run Wget with -N or -r so the file will be
          overwritten.

      --no-glob
          Turn off FTP globbing.  Globbing refers to the use of shell-like
          special characters (wildcards), like *, ?, [ and ] to retrieve
          more than one file from the same directory at once, like:

                  wget ftp://gnjilux.srk.fer.hr/*.msg

          By default, globbing will be turned on if the URL contains a
          globbing character.  This option may be used to turn globbing on
          or off permanently.

          You may have to quote the URL to protect it from being expanded by
          your shell.  Globbing makes Wget look for a directory listing,
          which is system-specific.  This is why it currently works only
          with Unix FTP servers (and the ones emulating Unix "ls" output).

      --no-passive-ftp
          Disable the use of the passive FTP transfer mode.  Passive FTP
          mandates that the client connect to the server to establish the
          data connection rather than the other way around.

          If the machine is connected to the Internet directly, both passive
          and active FTP should work equally well.  Behind most firewall and
          NAT configurations passive FTP has a better chance of working.
          However, in some rare firewall configurations, active FTP actually
          works when passive FTP doesn't.  If you suspect this to be the
          case, use this option, or set "passive_ftp=off" in your init file.

      --preserve-permissions
          Preserve remote file permissions instead of permissions set by
          umask.

      --retr-symlinks



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          By default, when retrieving FTP directories recursively and a
          symbolic link is encountered, the symbolic link is traversed and
          the pointed-to files are retrieved.  Currently, Wget does not
          traverse symbolic links to directories to download them
          recursively, though this feature may be added in the future.

          When --retr-symlinks=no is specified, the linked-to file is not
          downloaded.  Instead, a matching symbolic link is created on the
          local filesystem.  The pointed-to file will not be retrieved
          unless this recursive retrieval would have encountered it
          separately and downloaded it anyway.  This option poses a security
          risk where a malicious FTP Server may cause Wget to write to files
          outside of the intended directories through a specially crafted
          .LISTING file.

          Note that when retrieving a file (not a directory) because it was
          specified on the command-line, rather than because it was recursed
          to, this option has no effect.  Symbolic links are always
          traversed in this case.

    FTPS Options
      --ftps-implicit
          This option tells Wget to use FTPS implicitly. Implicit FTPS
          consists of initializing SSL/TLS from the very beginning of the
          control connection. This option does not send an "AUTH TLS"
          command: it assumes the server speaks FTPS and directly starts an
          SSL/TLS connection. If the attempt is successful, the session
          continues just like regular FTPS ("PBSZ" and "PROT" are sent,
          etc.).  Implicit FTPS is no longer a requirement for FTPS
          implementations, and thus many servers may not support it. If
          --ftps-implicit is passed and no explicit port number specified,
          the default port for implicit FTPS, 990, will be used, instead of
          the default port for the "normal" (explicit) FTPS which is the
          same as that of FTP, 21.

      --no-ftps-resume-ssl
          Do not resume the SSL/TLS session in the data channel. When
          starting a data connection, Wget tries to resume the SSL/TLS
          session previously started in the control connection.  SSL/TLS
          session resumption avoids performing an entirely new handshake by
          reusing the SSL/TLS parameters of a previous session. Typically,
          the FTPS servers want it that way, so Wget does this by default.
          Under rare circumstances however, one might want to start an
          entirely new SSL/TLS session in every data connection.  This is
          what --no-ftps-resume-ssl is for.

      --ftps-clear-data-connection
          All the data connections will be in plain text. Only the control
          connection will be under SSL/TLS. Wget will send a "PROT C"



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                                 2018-05-09



          command to achieve this, which must be approved by the server.

      --ftps-fallback-to-ftp
          Fall back to FTP if FTPS is not supported by the target server.
          For security reasons, this option is not asserted by default. The
          default behaviour is to exit with an error.  If a server does not
          successfully reply to the initial "AUTH TLS" command, or in the
          case of implicit FTPS, if the initial SSL/TLS connection attempt
          is rejected, it is considered that such server does not support
          FTPS.

    Recursive Retrieval Options
      -r
      --recursive
          Turn on recursive retrieving.    The default maximum depth is 5.

      -l depth
      --level=depth
          Specify recursion maximum depth level depth.

      --delete-after
          This option tells Wget to delete every single file it downloads,
          after having done so.  It is useful for pre-fetching popular pages
          through a proxy, e.g.:

                  wget -r -nd --delete-after http://whatever.com/~popular/page/

          The -r option is to retrieve recursively, and -nd to not create
          directories.

          Note that --delete-after deletes files on the local machine.  It
          does not issue the DELE command to remote FTP sites, for instance.
          Also note that when --delete-after is specified, --convert-links
          is ignored, so .orig files are simply not created in the first
          place.

      -k
      --convert-links
          After the download is complete, convert the links in the document
          to make them suitable for local viewing.  This affects not only
          the visible hyperlinks, but any part of the document that links to
          external content, such as embedded images, links to style sheets,
          hyperlinks to non-HTML content, etc.

          Each link will be changed in one of the two ways:

          +   The links to files that have been downloaded by Wget will be
              changed to refer to the file they point to as a relative link.




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              Example: if the downloaded file /foo/doc.html links to
              /bar/img.gif, also downloaded, then the link in doc.html will
              be modified to point to ../bar/img.gif.  This kind of
              transformation works reliably for arbitrary combinations of
              directories.

          +   The links to files that have not been downloaded by Wget will
              be changed to include host name and absolute path of the
              location they point to.

              Example: if the downloaded file /foo/doc.html links to
              /bar/img.gif (or to ../bar/img.gif), then the link in doc.html
              will be modified to point to http://hostname/bar/img.gif.

          Because of this, local browsing works reliably: if a linked file
          was downloaded, the link will refer to its local name; if it was
          not downloaded, the link will refer to its full Internet address
          rather than presenting a broken link.  The fact that the former
          links are converted to relative links ensures that you can move
          the downloaded hierarchy to another directory.

          Note that only at the end of the download can Wget know which
          links have been downloaded.  Because of that, the work done by -k
          will be performed at the end of all the downloads.

      --convert-file-only
          This option converts only the filename part of the URLs, leaving
          the rest of the URLs untouched. This filename part is sometimes
          referred to as the "basename", although we avoid that term here in
          order not to cause confusion.

          It works particularly well in conjunction with --adjust-extension,
          although this coupling is not enforced. It proves useful to
          populate Internet caches with files downloaded from different
          hosts.

          Example: if some link points to //foo.com/bar.cgi?xyz with
          --adjust-extension asserted and its local destination is intended
          to be ./foo.com/bar.cgi?xyz.css, then the link would be converted
          to //foo.com/bar.cgi?xyz.css. Note that only the filename part has
          been modified. The rest of the URL has been left untouched,
          including the net path ("//") which would otherwise be processed
          by Wget and converted to the effective scheme (ie. "http://").

      -K
      --backup-converted
          When converting a file, back up the original version with a .orig
          suffix.  Affects the behavior of -N.




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      -m
      --mirror
          Turn on options suitable for mirroring.  This option turns on
          recursion and time-stamping, sets infinite recursion depth and
          keeps FTP directory listings.  It is currently equivalent to -r -N
          -l inf --no-remove-listing.

      -p
      --page-requisites
          This option causes Wget to download all the files that are
          necessary to properly display a given HTML page.  This includes
          such things as inlined images, sounds, and referenced stylesheets.

          Ordinarily, when downloading a single HTML page, any requisite
          documents that may be needed to display it properly are not
          downloaded.  Using -r together with -l can help, but since Wget
          does not ordinarily distinguish between external and inlined
          documents, one is generally left with "leaf documents" that are
          missing their requisites.

          For instance, say document 1.html contains an "<IMG>" tag
          referencing 1.gif and an "<A>" tag pointing to external document
          2.html.  Say that 2.html is similar but that its image is 2.gif
          and it links to 3.html.  Say this continues up to some arbitrarily
          high number.

          If one executes the command:

                  wget -r -l 2 http://<site>/1.html

          then 1.html, 1.gif, 2.html, 2.gif, and 3.html will be downloaded.
          As you can see, 3.html is without its requisite 3.gif because Wget
          is simply counting the number of hops (up to 2) away from 1.html
          in order to determine where to stop the recursion.  However, with
          this command:

                  wget -r -l 2 -p http://<site>/1.html

          all the above files and 3.html's requisite 3.gif will be
          downloaded.  Similarly,

                  wget -r -l 1 -p http://<site>/1.html

          will cause 1.html, 1.gif, 2.html, and 2.gif to be downloaded.  One
          might think that:

                  wget -r -l 0 -p http://<site>/1.html

          would download just 1.html and 1.gif, but unfortunately this is



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          not the case, because -l 0 is equivalent to -l inf---that is,
          infinite recursion.  To download a single HTML page (or a handful
          of them, all specified on the command-line or in a -i URL input
          file) and its (or their) requisites, simply leave off -r and -l:

                  wget -p http://<site>/1.html

          Note that Wget will behave as if -r had been specified, but only
          that single page and its requisites will be downloaded.  Links
          from that page to external documents will not be followed.
          Actually, to download a single page and all its requisites (even
          if they exist on separate websites), and make sure the lot
          displays properly locally, this author likes to use a few options
          in addition to -p:

                  wget -E -H -k -K -p http://<site>/<document>

          To finish off this topic, it's worth knowing that Wget's idea of
          an external document link is any URL specified in an "<A>" tag, an
          "<AREA>" tag, or a "<LINK>" tag other than "<LINK
          REL="stylesheet">".

      --strict-comments
          Turn on strict parsing of HTML comments.  The default is to
          terminate comments at the first occurrence of -->.

          According to specifications, HTML comments are expressed as SGML
          declarations.  Declaration is special markup that begins with <!
          and ends with >, such as <!DOCTYPE ...>, that may contain comments
          between a pair of -- delimiters.  HTML comments are "empty
          declarations", SGML declarations without any non-comment text.
          Therefore, <!--foo--> is a valid comment, and so is <!--one--
          --two-->, but <!--1--2--> is not.

          On the other hand, most HTML writers don't perceive comments as
          anything other than text delimited with <!-- and -->, which is not
          quite the same.  For example, something like <!------------> works
          as a valid comment as long as the number of dashes is a multiple
          of four (!).  If not, the comment technically lasts until the next
          --, which may be at the other end of the document.  Because of
          this, many popular browsers completely ignore the specification
          and implement what users have come to expect: comments delimited
          with <!-- and -->.

          Until version 1.9, Wget interpreted comments strictly, which
          resulted in missing links in many web pages that displayed fine in
          browsers, but had the misfortune of containing non-compliant
          comments.  Beginning with version 1.9, Wget has joined the ranks
          of clients that implements "naive" comments, terminating each



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          comment at the first occurrence of -->.

          If, for whatever reason, you want strict comment parsing, use this
          option to turn it on.

    Recursive Accept/Reject Options
      -A acclist --accept acclist
      -R rejlist --reject rejlist
          Specify comma-separated lists of file name suffixes or patterns to
          accept or reject. Note that if any of the wildcard characters, *,
          ?, [ or ], appear in an element of acclist or rejlist, it will be
          treated as a pattern, rather than a suffix.  In this case, you
          have to enclose the pattern into quotes to prevent your shell from
          expanding it, like in -A "*.mp3" or -A '*.mp3'.

      --accept-regex urlregex
      --reject-regex urlregex
          Specify a regular expression to accept or reject the complete URL.

      --regex-type regextype
          Specify the regular expression type.  Possible types are posix or
          pcre.  Note that to be able to use pcre type, wget has to be
          compiled with libpcre support.

      -D domain-list
      --domains=domain-list
          Set domains to be followed.  domain-list is a comma-separated list
          of domains.  Note that it does not turn on -H.

      --exclude-domains domain-list
          Specify the domains that are not to be followed.

      --follow-ftp
          Follow FTP links from HTML documents.  Without this option, Wget
          will ignore all the FTP links.

      --follow-tags=list
          Wget has an internal table of HTML tag / attribute pairs that it
          considers when looking for linked documents during a recursive
          retrieval.  If a user wants only a subset of those tags to be
          considered, however, he or she should be specify such tags in a
          comma-separated list with this option.

      --ignore-tags=list
          This is the opposite of the --follow-tags option.  To skip certain
          HTML tags when recursively looking for documents to download,
          specify them in a comma-separated list.

          In the past, this option was the best bet for downloading a single



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          page and its requisites, using a command-line like:

                  wget --ignore-tags=a,area -H -k -K -r http://<site>/<document>

          However, the author of this option came across a page with tags
          like "<LINK REL="home" HREF="/">" and came to the realization that
          specifying tags to ignore was not enough.  One can't just tell
          Wget to ignore "<LINK>", because then stylesheets will not be
          downloaded.  Now the best bet for downloading a single page and
          its requisites is the dedicated --page-requisites option.

      --ignore-case
          Ignore case when matching files and directories.  This influences
          the behavior of -R, -A, -I, and -X options, as well as globbing
          implemented when downloading from FTP sites.  For example, with
          this option, -A "*.txt" will match file1.txt, but also file2.TXT,
          file3.TxT, and so on.  The quotes in the example are to prevent
          the shell from expanding the pattern.

      -H
      --span-hosts
          Enable spanning across hosts when doing recursive retrieving.

      -L
      --relative
          Follow relative links only.  Useful for retrieving a specific home
          page without any distractions, not even those from the same hosts.

      -I list
      --include-directories=list
          Specify a comma-separated list of directories you wish to follow
          when downloading.  Elements of list may contain wildcards.

      -X list
      --exclude-directories=list
          Specify a comma-separated list of directories you wish to exclude
          from download.  Elements of list may contain wildcards.

      -np
      --no-parent
          Do not ever ascend to the parent directory when retrieving
          recursively.  This is a useful option, since it guarantees that
          only the files below a certain hierarchy will be downloaded.

 ENVIRONMENT
      Wget supports proxies for both HTTP and FTP retrievals.  The standard
      way to specify proxy location, which Wget recognizes, is using the
      following environment variables:




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      http_proxy
      https_proxy
          If set, the http_proxy and https_proxy variables should contain
          the URLs of the proxies for HTTP and HTTPS connections
          respectively.

      ftp_proxy
          This variable should contain the URL of the proxy for FTP
          connections.  It is quite common that http_proxy and ftp_proxy are
          set to the same URL.

      no_proxy
          This variable should contain a comma-separated list of domain
          extensions proxy should not be used for.  For instance, if the
          value of no_proxy is .mit.edu, proxy will not be used to retrieve
          documents from MIT.

 EXIT STATUS
      Wget may return one of several error codes if it encounters problems.

      0   No problems occurred.

      1   Generic error code.

      2   Parse error---for instance, when parsing command-line options, the
          .wgetrc or .netrc...

      3   File I/O error.

      4   Network failure.

      5   SSL verification failure.

      6   Username/password authentication failure.

      7   Protocol errors.

      8   Server issued an error response.

      With the exceptions of 0 and 1, the lower-numbered exit codes take
      precedence over higher-numbered ones, when multiple types of errors
      are encountered.

      In versions of Wget prior to 1.12, Wget's exit status tended to be
      unhelpful and inconsistent. Recursive downloads would virtually always
      return 0 (success), regardless of any issues encountered, and non-
      recursive fetches only returned the status corresponding to the most
      recently-attempted download.




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 FILES
      /usr/local/etc/wgetrc
          Default location of the global startup file.

      .wgetrc
          User startup file.

 BUGS
      You are welcome to submit bug reports via the GNU Wget bug tracker
      (see <https://savannah.gnu.org/bugs/?func=additem&group=wget>) or to
      our mailing list <bug-wget@gnu.org>.

      Visit <https://lists.gnu.org/mailman/listinfo/bug-wget> to get more
      info (how to subscribe, list archives, ...).

      Before actually submitting a bug report, please try to follow a few
      simple guidelines.

      1.  Please try to ascertain that the behavior you see really is a bug.
          If Wget crashes, it's a bug.  If Wget does not behave as
          documented, it's a bug.  If things work strange, but you are not
          sure about the way they are supposed to work, it might well be a
          bug, but you might want to double-check the documentation and the
          mailing lists.

      2.  Try to repeat the bug in as simple circumstances as possible.
          E.g. if Wget crashes while downloading wget -rl0 -kKE -t5
          --no-proxy http://example.com -o /tmp/log, you should try to see
          if the crash is repeatable, and if will occur with a simpler set
          of options.  You might even try to start the download at the page
          where the crash occurred to see if that page somehow triggered the
          crash.

          Also, while I will probably be interested to know the contents of
          your .wgetrc file, just dumping it into the debug message is
          probably a bad idea.  Instead, you should first try to see if the
          bug repeats with .wgetrc moved out of the way.  Only if it turns
          out that .wgetrc settings affect the bug, mail me the relevant
          parts of the file.

      3.  Please start Wget with -d option and send us the resulting output
          (or relevant parts thereof).  If Wget was compiled without debug
          support, recompile it---it is much easier to trace bugs with debug
          support on.

          Note: please make sure to remove any potentially sensitive
          information from the debug log before sending it to the bug
          address.  The "-d" won't go out of its way to collect sensitive
          information, but the log will contain a fairly complete transcript



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          of Wget's communication with the server, which may include
          passwords and pieces of downloaded data.  Since the bug address is
          publically archived, you may assume that all bug reports are
          visible to the public.

      4.  If Wget has crashed, try to run it in a debugger, e.g. "gdb `which
          wget` core" and type "where" to get the backtrace.  This may not
          work if the system administrator has disabled core files, but it
          is safe to try.

 SEE ALSO
      This is not the complete manual for GNU Wget.  For more complete
      information, including more detailed explanations of some of the
      options, and a number of commands available for use with .wgetrc files
      and the -e option, see the GNU Info entry for wget.

 AUTHOR
      Originally written by Hrvoje Niki <hniksic@xemacs.org>.

 COPYRIGHT
      Copyright (c) 1996-2011, 2015, 2018 Free Software Foundation, Inc.

      Permission is granted to copy, distribute and/or modify this document
      under the terms of the GNU Free Documentation License, Version 1.3 or
      any later version published by the Free Software Foundation; with no
      Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
      Texts.  A copy of the license is included in the section entitled "GNU
      Free Documentation License".
























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