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WHO

Section: User Commands (1)
Updated: June 2025
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NAME

who - show who is logged on  

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
-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

GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Report any translation bugs to <https://translationproject.org/team/>  

SEE ALSO

Full documentation <https://www.gnu.org/software/coreutils/who>
or available locally via: info '(coreutils) who invocation'


Packaged by Debian (9.7-3)
Copyright © 2025 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <https://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.

 

Index

NAME
SYNOPSIS
DESCRIPTION
AUTHOR
REPORTING BUGS
SEE ALSO
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Time: 11:48:42 GMT, September 14, 2026