Comandos de la terminal/who

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who

[rrc@Llawyr ComandosDeLaTerminal]$ ssh priddwifi

                      Bienvenido a Pridd.LinuxCabal.org
                       Welcome to Pridd.LinuxCabal.org
                   Soyez bienvenus a  Pridd.LinuxCabal.org

                 AVISO: Estamos supervisando su comportamiento
                  WARNING:  We are monitoring this connection
                AVERTISSEMENT: Nous controlons cette connexion

                         El abuso no va a ser tolerado
                          Abuse will NOT be tolerated
                           L'abus ne sera pas tolere

Password: 
Last login: Fri May 16 23:47:10 2014

[rrc@pridd ~]$ who --help
Usage: 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
  -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 /run/utmp.  /var/log/wtmp as FILE is common.
If ARG1 ARG2 given, -m presumed: 'am i' or 'mom likes' are usual.

Report who bugs to bug-coreutils@gnu.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
For complete documentation, run: info coreutils 'who invocation'

[rrc@pridd ~]$ who --version
who (GNU coreutils) 8.21
Copyright (C) 2013 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.

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

[rrc@pridd ~]$ who
rrc      :0           2014-05-16 23:47
rrc      pts/0        2014-05-17 12:10 (192.168.51.57)

[rrc@pridd ~]$ who -a
           system boot  2014-05-16 23:46
rrc      ? :0           2014-05-16 23:47   ?          1306
           run-level 5  2014-05-16 23:47
rrc      + pts/0        2014-05-17 12:10   .         32697 (192.168.51.57)

[rrc@pridd ~]$ ps aux | grep 1306
rrc        591  0.0  0.0  15444  1000 pts/0    S+   12:16   0:00 grep --color 1306
rrc       1306  0.0  0.2 774008  8112 ?        Ssl  May16   0:00 gnome-session

[rrc@pridd ~]$ ps aux | grep 32697
rrc        580  0.0  0.0  15444  1004 pts/0    S+   12:15   0:00 grep --color 32697
root     32697  0.0  0.0  90620  3816 ?        Ss   12:10   0:00 sshd: rrc [priv]    

[rrc@pridd ~]$ who -b
         system boot  2014-05-16 23:46

[rrc@pridd ~]$ who -H
NAME     LINE         TIME             COMMENT
rrc      :0           2014-05-16 23:47
rrc      pts/0        2014-05-17 12:10 (192.168.51.57)

[rrc@pridd ~]$ who -m
rrc      pts/0        2014-05-17 12:10 (192.168.51.57)

[rrc@pridd ~]$ who -q
rrc rrc
# users=2

[rrc@pridd ~]$ who -r
         run-level 5  2014-05-16 23:47

[rrc@pridd ~]$ who -uH
NAME     LINE         TIME             IDLE          PID COMMENT
rrc      :0           2014-05-16 23:47   ?          1306
rrc      pts/0        2014-05-17 12:10   .         32697 (192.168.51.57)