Using the PS Command

swamprat · 02-04-2017, 05:39 PM

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

syg00 · 02-04-2017, 05:56 PM

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

Habitual · 02-04-2017, 06:31 PM

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

Code:

pidof <process>

Doug G · 02-04-2017, 11:14 PM

pgrep is also handy

erik2282 · 02-04-2017, 11:40 PM

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

Shadow_7 · 02-07-2017, 05:04 AM

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.