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.
GNU coreutils online help:
Report who translation bugs to
AUTHOR
Written by Joseph Arceneaux, David MacKenzie, and Michael Stone.
COPYRIGHT
Copyright © 2013 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.
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 com‐
mand
info coreutils 'who invocation'
should give you access to the complete manual.
GNU coreutils 8.22 October 2018 WHO(1)