NAME
    who - show who is logged on

SYNOPSIS
    who [OPTION]... [ FILE | ARG1 ARG2 ]

DESCRIPTION
    -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

    -i, --idle
    add idle time as HOURS:MINUTES, . or old (deprecated, use -u)

    --login
    print system login processes (equivalent to SUS -l)

    -l, --lookup
    attempt to canonicalize hostnames via DNS (-l is deprecated, use
    --lookup)

    -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.

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

REPORTING BUGS
    Report bugs to <bug-coreutils@gnu.org>.

COPYRIGHT
    Copyright (C) 2002 Free Software Foundation, Inc.
    This is free software; see the source for copying conditions. There is
    NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
    PURPOSE.

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 who

    should give you access to the complete manual.