Linux Commands Examples

A great documentation place for Linux commands


show who is logged on


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

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Print information about users who are currently logged in.
, --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


print ips instead of hostnames. with --lookup, canonicalizes based on stored IP, if available, rather than stored hostname

-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.


Copyright © 2012 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

reporting bugs

Report who bugs to bug-coreutils[:at:]gnu[:dot:]org
GNU coreutils home page: <>
General help using GNU software: <>
Report who translation bugs to <>

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.


Written by Joseph Arceneaux, David MacKenzie, and Michael Stone.

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