who - show who is logged on


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


   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

          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

          same as -T

          same as -T

   --help display this help and exit

          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


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


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


   Copyright  2016 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.


   Full documentation at: <http://www.gnu.org/software/coreutils/who>
   or available locally via: info '(coreutils) who invocation'


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