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Commands and references ( GNU / linux kernel 2.4.18-3 and 2.4.18-14 )   
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The commands with their most common usage are in brackets like this: [ command ].
Don't type the brackets, just what is inside of them.

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WHO(1)                           User Commands                          WHO(1)

       who - show who is logged on

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

       -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)

       -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.

       Report bugs to (

       Copyright .© 2004 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

       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-

              info coreutils who

       should give you access to the complete manual.

who (coreutils) 5.2.1            October 2004                           WHO(1)

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