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.

same as -b -d --login -p -r -t -T -u
time of last system boot
print dead processes
print line of column headings
print system login processes
attempt to canonicalize hostnames via DNS
only hostname and user associated with stdin
print active processes spawned by init
all login names and number of users logged on
print current runlevel
print only name, line, and time (default)
print last system clock change
add user's message status as +, - or ?
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.

GNU coreutils online help: https://www.gnu.org/software/coreutils/
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Copyright © 2024 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'

March 2024 GNU coreutils 9.5