who command help
who - show who is logged on
who [OPTION]... [ FILE | ARG1 ARG2 ]
print line of column headings
-i, -u, --idle
add user idle time as HOURS:MINUTES, . or old
attempt to canonicalize hostnames via DNS
-m only hostname and user associated with stdin
all login names and number of users logged on
-T, -w, --mesg
add user's message status as +, - or ?
same as -T
same as -T
--help display this help and exit
output version information and exit
If FILE is not specified, use /var/run/utmp.
/var/log/wtmp as FILE is common. If ARG1 ARG2 given, -m
presumed: `am i' or `mom likes' are usual.
Report bugs to <firstname.lastname@example.org>.
The full documentation for who is maintained as a Texinfo
manual. If the info and who programs are properly
installed at your site, the command
should give you access to the complete manual.
Copyright © 1999 Free Software Foundation, Inc.
This is free software; see the source for copying condi
tions. There is NO warranty; not even for MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE.
Comments - most recent first
(Please feel free to answer questions posted by others!)
(09 Apr 2012, 19:51
The functionality of the 'who' command on my server has changed. Up until
about 6 weeks ago it worked the way it should. Now when I issue 'who' I do
not see the other logged in users. I only see the user I am logged in as.
This server is a virtual server in hosted environment. So, I not
necessarily informed about all the server admin activity that goes on.
I inquired with the appropriate tech support, but was blown off with a
response that suggested our version of Linux (a fairly current versions of
RHEL) might not support the 'who' command. I say hogwash. I am absolutely
certain that I have used the command successfully in the not too distant
past and certainly in our RHEL environment.
Do you have any suggestions for what might cause this change?
I welcome your comments. However... I am puzzled by many people
who say "Please send me the Linux tutorial." This website *is* your Linux Tutorial! Read everything here, learn
all you can, ask questions if you like. But don't ask me to send what you already have. :-)
NO SPAM! If you post garbage, it will be deleted, and you will be banned.
by Bob Rankin
All rights reserved - Redistribution is allowed only with permission.