_________________________________________
/ You two ought to be more careful--your  \
\ love could drag on for years and years. /
 -----------------------------------------
       \   ,__,
        \  (oo)____
           (__)    )\
              ||--|| *
[adam@tux ~]$ cat /etc/lsb-release
DISTRIB_ID=LinuxMint
DISTRIB_RELEASE=9
DISTRIB_CODENAME=isadora
DISTRIB_DESCRIPTION="Linux Mint 9 Isadora - Xfce"
[adam@tux ~]$ w
 12:27:35 up 1 day, 22:26,  2 users,  load average: 1.11, 1.30, 1.18
USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT
adam     tty7     :0               12:19   46:26m  1:32   0.04s /bin/sh /etc/xd
adam     pts/0    :0.0             12:27    0.00s  0.77s  0.01s w
[adam@tux ~]$ who
adam     tty7         2010-08-22 12:19 (:0)
adam     pts/0        2010-08-22 12:27 (:0.0)
[adam@tux ~]$ ps -U rtc -a
ERROR: User name does not exist.
********* simple selection *********  ********* selection by list *********
-A all processes                      -C by command name
-N negate selection                   -G by real group ID (supports names)
-a all w/ tty except session leaders  -U by real user ID (supports names)
-d all except session leaders         -g by session OR by effective group name
-e all processes                      -p by process ID
T  all processes on this terminal     -s processes in the sessions given
a  all w/ tty, including other users  -t by tty
g  OBSOLETE -- DO NOT USE             -u by effective user ID (supports names)
r  only running processes             U  processes for specified users
x  processes w/o controlling ttys     t  by tty
*********** output format **********  *********** long options ***********
-o,o user-defined  -f full            --Group --User --pid --cols --ppid
-j,j job control   s  signal          --group --user --sid --rows --info
-O,O preloaded -o  v  virtual memory  --cumulative --format --deselect
-l,l long          u  user-oriented   --sort --tty --forest --version
-F   extra full    X  registers       --heading --no-heading --context
                    ********* misc options *********
-V,V  show version      L  list format codes  f  ASCII art forest
-m,m,-L,-T,H  threads   S  children in sum    -y change -l format
-M,Z  security data     c  true command name  -c scheduling class
-w,w  wide output       n  numeric WCHAN,UID  -H process hierarchy
[adam@tux ~]$
[adam@tux ~]$ cat /etc/lsb-release
DISTRIB_ID=LinuxMint
DISTRIB_RELEASE=9
DISTRIB_CODENAME=isadora
DISTRIB_DESCRIPTION="Linux Mint 9 Isadora - Xfce"
[adam@tux ~]$ w
 12:28:09 up 1 day, 22:26,  2 users,  load average: 1.66, 1.42, 1.23
USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT
adam     tty7     :0               12:19   46:26m  1:38   0.04s /bin/sh /etc/xd
adam     pts/0    :0.0             12:27    0.00s  0.76s  0.00s w
[adam@tux ~]$ who
adam     tty7         2010-08-22 12:19 (:0)
adam     pts/0        2010-08-22 12:27 (:0.0)
[adam@tux ~]$ ps -U kipx -a
  PID TTY          TIME CMD
15558 ?        00:00:00 gnome-keyring-d
20214 ?        00:00:00 gnome-keyring-d
27818 pts/0    00:00:00 ps
[adam@tux ~]$ pkill -KILL -u kipx
pkill: 15558 - Operation not permitted
pkill: 20214 - Operation not permitted
[adam@tux ~]$ su !!
su pkill -KILL -u kipx
su: invalid option -- 'K'
Usage: su [options] [LOGIN]

Options:
  -c, --command COMMAND         pass COMMAND to the invoked shell
  -h, --help                    display this help message and exit
  -, -l, --login                make the shell a login shell
  -m, -p,
  --preserve-environment        do not reset environment variables, and
                                keep the same shell
  -s, --shell SHELL             use SHELL instead of the default in passwd

[adam@tux ~]$ su pkill -kill -u kipx
su: invalid option -- 'k'
Usage: su [options] [LOGIN]

Options:
  -c, --command COMMAND         pass COMMAND to the invoked shell
  -h, --help                    display this help message and exit
  -, -l, --login                make the shell a login shell
  -m, -p,
  --preserve-environment        do not reset environment variables, and
                                keep the same shell
  -s, --shell SHELL             use SHELL instead of the default in passwd

[adam@tux ~]$ sudo deluser kipx
Removing user `kipx' ...
Warning: group `kipx' has no more members.
userdel: user kipx is currently logged in
/usr/sbin/deluser: `/usr/sbin/userdel kipx' returned error code 8. Exiting.
[adam@tux ~]$
[adam@tux ~]$ cat /etc/lsb-release
DISTRIB_ID=LinuxMint
DISTRIB_RELEASE=9
DISTRIB_CODENAME=isadora
DISTRIB_DESCRIPTION="Linux Mint 9 Isadora - Xfce"
[adam@tux ~]$ w
 12:30:15 up 1 day, 22:28,  2 users,  load average: 1.28, 1.43, 1.26
USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT
adam     tty7     :0               12:19   46:28m  2:01   0.04s /bin/sh /etc/xd
adam     pts/0    :0.0             12:27    0.00s  0.77s  0.01s w
[adam@tux ~]$ who
adam     tty7         2010-08-22 12:19 (:0)
adam     pts/0        2010-08-22 12:27 (:0.0)
[adam@tux ~]$ ps -U kipx -a
  PID TTY          TIME CMD
15558 ?        00:00:00 gnome-keyring-d
20214 ?        00:00:00 gnome-keyring-d
29147 pts/0    00:00:00 ps
[adam@tux ~]$ pkill -KILL -u kipx
pkill: 15558 - Operation not permitted
pkill: 20214 - Operation not permitted
[adam@tux ~]$ sudo deluser kipx
Removing user `kipx' ...
Warning: group `kipx' has no more members.
userdel: user kipx is currently logged in
/usr/sbin/deluser: `/usr/sbin/userdel kipx' returned error code 8. Exiting.
[adam@tux ~]$