ps, is a Linux command tool, that lets you view the current running processes, it is very useful when you are trying to kill a process or to view which applications other users are running (if you are the admin).
You may use it to check your own applications, some other user's application or a full list of the applications running on the operating system, you may also combine it with grep.
running it alone with no atributes
Will give your actual running applications.
6999 pts/1 00:00:00 bash 7099 pts/1 00:00:00 ps
notice, that those are the running applications in that given console, so if you have a lot of running virtual terminals, it will only list those running (started from) that give one.
If you want to check all the processes you are running, enter:
ps -u username
Where username is your username.
The output for me now is:
PID TTY TIME CMD 3270 ? 00:00:00 gnome-session 3316 ? 00:00:00 ssh-agent 3319 ? 00:00:00 dbus-launch 3320 ? 00:00:00 dbus-daemon 3325 ? 00:00:00 gconfd-2 3328 ? 00:00:00 gnome-keyring-d 3330 ? 00:00:05 gnome-settings- 3345 ? 00:00:16 gnome-screensav 3346 ? 00:00:05 openbox 3347 ? 00:00:31 gnome-panel 3349 ? 00:00:03 nautilus 3352 ? 00:00:00 bonobo-activati 3358 ? 00:00:00 bluetooth-apple 3361 ? 00:00:00 update-notifier 3369 ? 00:00:00 gnome-vfs-daemo 3372 ? 00:00:00 gnome-volume-ma 3381 ? 00:00:00 gnome-power-man 3409 ? 00:00:00 mapping-daemon 3418 ? 00:00:00 mixer_applet2 3457 ? 00:15:43 firefox-bin 3530 ? 00:00:04 notification-da 3544 ? 00:00:00 icedove 3556 ? 00:00:00 run-mozilla.sh 3561 ? 00:01:00 icedove-bin 3579 ? 00:00:06 gnome-terminal 3582 ? 00:00:00 gnome-pty-helpe 3583 pts/0 00:00:00 bash 3617 pts/0 00:00:00 ssh 3707 ? 00:00:09 gftp-gtk 6999 pts/1 00:00:00 bash 7100 pts/1 00:00:00 ps
The first column shows the PID the second the terminal where the process is running, the third, the time it is running and the last one the name of the application.
To check all running applications, enter
another good option is:
Which will be like the above one, but will also shows you the CPU and Memory load that every process is charging on the PC.
check man ps, to view more options and examples.