CKNFS(1L) NCSA CKNFS(1L)
06/10/89
NAME
cknfs - check for dead NFS servers
SYNOPSIS
cknfs [ -esvDL ] [ -t timeout ] [path...]
DESCRIPTION
Cknfs takes a list of execution paths. Each path is examined for an
NFS mount point. If found, the corresponding NFS server is checked.
Paths that lead to dead NFS servers are ignored. The remaining paths
are printed to stdout.
Options
The following options are available,
-e Silent. Do not print paths.
-s Print paths in sh format, with colons as separators.
-u Unique paths. Keep only the first pathname when several paths
reference the same directory. Symbolic links are de-referenced
before comparison.
-t timeout
Specify the timeout interval before assuming an NFS server is
dead. The default is 10 seconds.
-v Verbose. A status message is printed for each NFS server.
-D Debug. Messages are printed as the paths are parsed.
-L Expand symbolic links on output. This increases the efficiency
of shell path searches on machines without a kernel directory
name cache.
EXAMPLES
set path = `/usr/lbin/cknfs /bin /usr/bin /usr/ucb . /usr6/bin
/sdg/bin`
alias cd 'cknfs -e \!*; if ($status == 0) chdir \!*'
The latter example checks the path before performing a chdir
operation.
SEE ALSO
nfs(4)
AUTHOR
Alan Klietz
National Center for Supercomputing Applications
- 1 - Formatted: October 28, 2025
CKNFS(1L) NCSA CKNFS(1L)
06/10/89
BUGS
In some instances, a path that cknfs assumes valid could be vulnerable
to hanging if a 3rd party machine fails. This happens if your
administrator mixes NFS mount points and/or regular directories with
NFS directories from 3rd party machines. The best organization is an
overall /nfs directory with local subdirectories for each server
machine and with mount points located therein.
- 2 - Formatted: October 28, 2025
