WHO(1) User Commands WHO(1) 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 Written by Joseph Arceneaux, David MacKenzie, and Michael Stone. COPYRIGHT Copyright © 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent per‐ mitted 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 command info coreutils 'who invocation' should give you access to the complete manual. GNU coreutils 8.22 November 2016 WHO(1)