WHO(category14-security-amp-firewalls.html) - phpMan

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
       --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
       GNU coreutils online help: <https://www.gnu.org/software/coreutils/>;
       Report who translation bugs to <https://translationproject.org/team/>;
COPYRIGHT
       Copyright  (C) 2018 Free Software Foundation, Inc.  License GPLv3+: GNU
       GPL version 3 or later <https://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.
SEE ALSO
       Full documentation at: <https://www.gnu.org/software/coreutils/who>;
       or available locally via: info '(coreutils) who invocation'
GNU coreutils 8.30                 July 2018                            WHO(1)