who
who - show who is logged on
Synopsis
who [OPTION]... [ FILE | ARG1 ARG2 ]Description
-a, --all same as -b -d --login -p -r -t -T -u
-b, --boot time of last system boot
-d, --dead print dead processes
-H, --heading print line of column headings
--ips print ips instead of hostnames. with --lookup, canonicalizes based on stored IP, if available, rather than stored hostname
-l, --login print system login processes
--lookup attempt to canonicalize hostnames via DNS
-m only hostname and user associated with stdin
-p, --process print active processes spawned by init
-q, --count all login names and number of users logged on
-r, --runlevel print current runlevel
-s, --short print only name, line, and time (default)
-t, --time print last system clock change
-T, -w, --mesg add user's message status as +, - or ?
-u, --users list users logged in
--message same as -T
--writable same as -T
--help display this help and exit
--version 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.
Author
Written by Joseph Arceneaux, David MacKenzie, and Michael Stone.Reporting bugs
Report bugs to <bug-coreutils@gnu.org>.Copyright
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 licence GPL. There is NO WARRANTY, to the extent permitted by law.See also
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 info who should give you access to the complete manual.who 5.97 January 2007 WHO(1)