SYNOPSIS
who [OPTION]... [ FILE | ARG1 ARG2 ]
DESCRIPTION
Print information about users who are currently logged in.
- -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 who bugs to bug-coreutils@gnu.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
Report who translation bugs to <http://translationproject.org/team/>
COPYRIGHT
Copyright © 2013 Free Software Foundation, Inc. License
GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. 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 coreutils 'who invocation'
should give you access to the complete manual.