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HTML rendering created 2026-05-24 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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NAME | SYNOPSIS | DESCRIPTION | AUTHOR | REPORTING BUGS | COPYRIGHT | SEE ALSO | COLOPHON |
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WHO(1) User Commands WHO(1)
who - show who is logged on
who [OPTION]... [ FILE | ARG1 ARG2 ]
Print information about users who are currently logged in.
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#who-a\-a, --all]8;;\
same as -b -d --login -p -r -t -T -u
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#who-b\-b, --boot]8;;\
time of last system boot
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#who-d\-d, --dead]8;;\
print dead processes
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#who-H\-H, --heading]8;;\
print line of column headings
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#who-l\-l, --login]8;;\
print system login processes
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#who--lookup\--lookup]8;;\
attempt to canonicalize hostnames via DNS
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#who-m\-m]8;;\ only hostname and user associated with standard input
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#who-p\-p, --process]8;;\
print active processes spawned by init
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#who-q\-q, --count]8;;\
all login names and number of users logged on
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#who-r\-r, --runlevel]8;;\
print current runlevel
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#who-s\-s, --short]8;;\
print only name, line, and time (default)
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#who-t\-t, --time]8;;\
print last system clock change
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#who-T\-T, -w, --mesg]8;;\
add user's message status as +, - or ?
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#who-u\-u, --users]8;;\
list users logged in, including idle time
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#who--message\--message]8;;\
same as -T
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#who--writable\--writable]8;;\
same as -T
]8;;https://www.gnu.org/software/coreutils/who#who--help\--help]8;;\ display this help and exit
]8;;https://www.gnu.org/software/coreutils/who#who--version\--version]8;;\
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 bugs to: bug-coreutils@gnu.org
GNU coreutils home page: <https://www.gnu.org/software/coreutils/>
General help using GNU software: <https://www.gnu.org/gethelp/>
Report any translation bugs to
<https://translationproject.org/team/>
Copyright © 2026 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.
Full documentation <https://www.gnu.org/software/coreutils/who>
or available locally via: info '(coreutils) who invocation'
This page is part of the coreutils (basic file, shell and text
manipulation utilities) project. Information about the project
can be found at ⟨http://www.gnu.org/software/coreutils/⟩. If you
have a bug report for this manual page, see
⟨http://www.gnu.org/software/coreutils/⟩. This page was obtained
from the tarball coreutils-9.11.tar.xz fetched from
⟨http://ftp.gnu.org/gnu/coreutils/⟩ on 2026-05-24. If you
discover any rendering problems in this HTML version of the page,
or you believe there is a better or more up-to-date source for the
page, or you have corrections or improvements to the information
in this COLOPHON (which is not part of the original manual page),
send a mail to man-pages@man7.org
GNU coreutils 9.11 April 2026 WHO(1)
Pages that refer to this page: last(1), users(1), utmpdump(1), w(1), utmp(5)
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HTML rendering created 2026-05-24 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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