who

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

       --ips  print  ips  instead  of  hostnames. with --lookup, canonicalizes
              based on stored IP, if available, rather than stored hostname

       -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.

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

REPORTING BUGS
       Report who bugs to bug-coreutils@gnu.org
       GNU coreutils home page: 
       General help using GNU software: 

COPYRIGHT
       Copyright © 2009 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 7.4               September 2010                          WHO(1)