LWHO(1) LWHO(1)
NAME
lwho, luptime - show who is using local machines
SYNOPSIS
lwho [ -uuser ] [ -mmachine ] [ -x ] [ -a ] [ -i ] [ -r ]
luptime [ -uuser ] [ -mmachine ] [ -x ] [ -a ] [ -b ] [ -l ] [ -n ] [
-u ] [ -r ]
a.out -p [ lwho_options ]
a.out -h [ luptime_options ]
DESCRIPTION
Lwho and luptime are the user program for the ``low-cost rwho''
package. The read the text files that lwhod(8) creates in an
NFS-mounted spool directory, and presents the information in a variety
of useful ways. The program is linked under two different names, and
the output will vary depending on how it is invoked. To find host-
oriented information, invoke luptime or use the ``-h'' flag. To find
person-oriented information, invoke lwho or use the ``-p'' flag.
By default, the programs show information about all users on all
hosts. To see information about a specified set of users or hosts,
use the ``-u'' flag specify the login names of the desired users, or
the ``-m'' flag to specify the names of the desired hosts. These
flags may be repeated to specify a collection of hosts or users, and
may be used together to specify an intersection. For example:
lwho -u rsalz
lwho -u root -m fig.bbn.com -m pineapple.bbn.com
lwho -m fig.bbn.com -m pineapple.bbn.com
The first line finds all machines where ``rsalz'' is logged in; the
second line finds if ``root'' is logged in on ``fig'' or
``pineapple''; the third line shows all users logged in to either of
those machines.
When reporting, output is normally sorted alphabetically by the host
or user name; this may be specified by using tyhe ``-a'' flag. To
sort by uptime (first machine booted first), use the ``-b'' flag. To
sort by the number of users (smallest number first), use the ``-n''
flag. To sort by the load average (most lightly-loaded machine
first), use the ``-l'' flag. To sort by idle time (most recently used
terminal first), use the ``-i'' flag. To reverse the sorting,
regardless of the method, use the ``-r'' flag. For lwho, only the
``-i'' flag makes sense, if any other flag is given it is ignored.
For luptime, the ``-i'' flag is ignored.
If no users (for lwho), or no hosts (for luptime), are found, no
output is generated. To suppress the banner (useful when feeding into
a pipeline), use the ``-x'' flag.
- 1 - Formatted: November 8, 2025
LWHO(1) LWHO(1)
BUGS
There are no hueristics to tell if a host is up or down, or ignore
users who have been idle for a long time the way rwho(1) and
ruptime(1) can and do.
FILES
/usr/spool/lwho/hostname Load and user data
AUTHOR
Rich $alz; <rsalz@bbn.com>.uu.net>.
There is no copyright on this package.
SEE ALSO
lwhod(8).
- 2 - Formatted: November 8, 2025
