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

--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: <http://www.gnu.org/software/coreutils/> Report who translation bugs to <http://translationproject.org/team/>

Packaged by Cygwin (8.23-4) Copyright © 2014 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 permitted by law.

AUTHOR
Written by Joseph Arceneaux, David MacKenzie, and Michael Stone.

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.