WHO(1) User Commands WHO(1)
who - show who is logged on
who [OPTION]... [ FILE | ARG1 ARG2 ]
same as -b -d --login -p -r -t -T -u
time of last system boot
print dead processes
print line of column headings
print system login processes
attempt to canonicalize hostnames via DNS
-m only hostname and user associated with stdin
print active processes spawned by init
all login names and number of users logged on
print current runlevel
print only name, line, and time (default)
print last system clock change
-T, -w, --mesg
add user's message status as +, - or ?
list users logged in
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
Written by Joseph Arceneaux, David MacKenzie, and Michael Stone.
Report bugs to <email@example.com>.
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software. You may redistribute copies of it under the
terms of the GNU General Public License
<http://www.gnu.org/licenses/gpl.html>. There is NO WARRANTY, to the
extent permitted by law.
The full documentation for who is maintained as a Texinfo manual. If
the info and who programs are properly installed at your site, the com-
should give you access to the complete manual.
who 5.97 March 2012 WHO(1)