1. To display information about your processes that are currently running:
ps
PID TTY TIME COMMAND
13185 ttyAF/ABFd 0:00 rlogind
13187 ttyAF/ABFd 0:01 bash
13218 ttyAF/ABFd 0:00 ps
This user currently has three active processes; the process associated with the ps command itself (13218); their current shell (13187) and a process associated with the remote login (13185) which indicates that they have logged in to their account on this system from another system.
2. To display information about all your processes (System V)
ps -u joanne
PID TTY TIME COMMAND
13251 ttyAF/ABFd 0:00 ps
13187 ttyAF/ABFd 0:01 bash
18765 ? 0:08 xclock
3012 ? 0:00 bash
3015 ? 0:00 zmail.ne
3016 ? 4:03 zmail.bi
18465 ? 0:00 bash
18469 ? 0:34 xman
This user has several processes that are not associated with a controlling terminal. They can be identified by the ? (question mark) under the TTY column.
3. To display information about the processes associated with another user (System V)
ps -u rob
PID TTY TIME COMMAND
1390 ttyAH/ABHb 0:18 bash
1403 ttyAH/ABHc 0:01 bash
1435 ttyAH/ABHY 0:01 bash
1471 ttyAH/ABHY 5:57 ream
2307 ttyAH/ABHb 0:29 xbiff
2315 ttyAH/ABHb 0:27 xbiff
The user rob is running three instances of the bash shell, a mail program known as ream and two biff utilities.