who - Unix, Linux Command

NAME

who - show who is logged on

SYNOPSIS

who [OPTION]... [ FILE | ARG1 ARG2 ]

DESCRIPTION

Tag	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
-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 © 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.