LinuxQuestions.org - Using the PS Command

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Using the PS Command

Greetings,

How do you use the PS command to see if a particular program (demon) is running.

PS -ef gives a whole lot of information but it's just to much and I only am looking for one program.

Thanks

If you know the full name, use "-C" - documented in the manpage.
If not, pipe it to grep.

If you know the process name, just ask for the pid using

Code:

pidof <process>

http://linuxcommand.org/man_pages/ps1.html

example:

Code:

erik@mymachine:~$ ps aux | grep erik | grep kde

erik      328  0.0  0.0  10700  340 ?        Ss  17:51  0:00 /usr/bin/ssh-agent /usr/bin/dbus-launch --exit-with-session /usr/bin/startkde

erik      331  0.0  0.0  24504  1828 ?        S    17:51  0:00 /usr/bin/dbus-launch --exit-with-session /usr/bin/startkde

erik      372  0.0  0.0  4084    80 ?        S    17:51  0:00 /usr/lib/kde4/libexec/start_kdeinit +kcminit_startup

erik      373  0.0  0.3 404084 62120 ?        Ss  17:51  0:00 kdeinit4: kdeinit4 Running...                  

erik      374  0.0  0.2 410356 39884 ?        S    17:51  0:00 kdeinit4: klauncher [kdeinit] --fd=9          

erik      376  0.0  0.4 1492000 68532 ?      Sl  17:51  0:01 kdeinit4: kded4 [kdeinit]                      

erik      601  0.0  0.3 594248 51680 ?        Sl  17:51  0:00 kdeinit4: ksmserver [kdeinit]                  

erik      606  0.0  0.1 386852 30292 ?        Sl  17:51  0:00 /usr/lib/kde4/libexec/kdeconnectd

erik      1251  0.0  0.2 395744 33460 ?        Sl  17:51  0:00 /usr/lib/kde4/libexec/polkit-kde-authentication-agent-1

erik      3532  0.0  0.0  12732  2280 pts/0    S+  23:39  0:00 grep kde

erik    32753  0.0  0.0  4336  1572 ?        Ss  17:51  0:00 /bin/sh /usr/bin/startkde

Note that it's "ps" and not "PS", linux is case sensitive.

$ COLUMNS=300 ps -FlAw | grep -i X

And +1 to pgrep being useful.

$ kill -9 $(pgrep chrome)

Poor mans killall. Or at least for those too lazy / underprivileged to install killall.