Section: User Commands (1)
Updated: March 2014Index
Return to Main Contents
who – show who is logged on
[OPTION]… [ FILE | ARG1 ARG2 ]
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
- -l, –login
print system login processes
attempt to canonicalize hostnames via DNS
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
same as -T
same as -T
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.
Written by Joseph Arceneaux, David MacKenzie, and Michael Stone.
Report who bugs to [email protected]
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 © 2010 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.
The full documentation for
is maintained as a Texinfo manual. If the
programs are properly installed at your site, the command
info coreutils ‘who invocation’
should give you access to the complete manual.
- REPORTING BUGS
- SEE ALSO