How to get PID of process by specifying process name and store it in a variable to use further?

Question

By using "ucbps" command i am able to get all PIDs

$ ucbps
 
 Userid PID CPU % Mem % FD Used Server Port
 =========================================================================
 
 512 5783 2.50 16.30 350 managed1_adrrtwls02 61001
 512 8896 2.70 21.10 393 admin_adrrtwls02 61000
 512 9053 2.70 17.10 351 managed2_adrrtwls02 61002

I want to do it like this, but don't know how to do

1. variable=get pid of process by processname.
2. Then use this command kill -9 variable.

Answer 1

If you want to kill -9 based on a string (you might want to try kill first) you can do something like this:

ps axf | grep <process name> | grep -v grep | awk '{print "kill -9 " 1ドル}'

This will show you what you're about to kill (very, very important) and just pipe it to sh when the time comes to execute:

ps axf | grep <process name> | grep -v grep | awk '{print "kill -9 " 1ドル}' | sh

• spig: a way to avoid the "grep -v grep" is to use "grep <process nam[e]>" so it interpolates the string and the process nam[e] isn't found when the first grep executes, if that makes sense.
• Gautam Jose: I think this is easier pgrep -f <process name> | awk '{print "kill -9 " 1ドル}' | sh

Answer 2

pids=$(pgrep <name>)

will get you the pids of all processes with the given name. To kill them all, use

kill -9 $pids

To refrain from using a variable and directly kill all processes with a given name issue

pkill -9 <name>

• Nidhi: $ pids=$(pgrep admin_adrrtwls02) $ kill -9 $pids Usage: kill [-l] [-n signum] [-s signame] job ... Or: kill [ options ] -l [arg ...]
• XZS: Unix programs tend print out their usage description when needed arguments are not given. In your example, most probably no process with the name admin_adrrtwls02 was found. Therefore $pids evaluates to the empty string and kill is executed without a process id argument. pgrep searches for a process name, not for the user name. But there also are the flags -u and -U to restrict pgrep to given user ids.
• Nidhi: there was process with this name admin_adrrtwls02. The above answer by Ben solved my problem. His solution worked.
• Arash: pkill doesn't require -9. For example you can use pkill firfox.
• XZS: -9, used to send SIGKILL, is not required, but mentioned in the question. Without it, the less violent SIGTERM (Signal number 15) will be sent.

Answer 3

On a single line...

pgrep -f process_name | xargs kill -9

• panticz: As already mentioned in other comments the -f parameter could be helpful here ` -f The pattern is normally only matched against the process name. When -f is set, the full command line is used.` pgrep -f process_name | xargs kill -9

Answer 4

Another possibility would be to use pidof it usually comes with most distributions. It will return you the PID of a given process by using it's name.

pidof process_name

This way you could store that information in a variable and execute kill -9 on it.

#!/bin/bash
pid=`pidof process_name`
kill -9 $pid

Answer 5

Solution (Exact Process Name Match)

pgrep -x <process_name> | xargs kill -9 

(incidentally, for this specific use case, might as well do pkill -9 -x <process_name>, but the question asked how to get the PID in general)

Details

The problem with the accepted answer (and all other answers) is that pgrep without -x (or manually ps | grep, or, for some reason, pidof) will match processes for which the <process_name> term is a substring.

So, for example, pgrep installd matches, on my machine (macOS 13.0 22A380 arm64) now:

❯ pgrep -l installd
316 uninstalld
33158 system_installd
33160 installd 

I obviously only want 33160, not the other ones.

For some reason, pidof has the same issue:

❯ pidof installd
316 33158 33160 

pregp -x is the the only viable solution (beyond messing around with regexes with the ps | grep solution, I suppose)

❯ pgrep -xl installd
33160 installd 

Answer 6

use grep [n]ame to remove that grep -v name this is first... Sec using xargs in the way how it is up there is wrong to run whatever it is piped you have to use -i (interactive mode) otherwise you may have issues with the command.

ps axf | grep <process name> | grep -v grep | awk '{print "kill -9 " 1ドル}'? ps aux | grep [n]ame | awk '{print "kill -9 " 2ドル}'? isn't that better?

• Pawel K: even better: pidof name |xargs -i kill -9 {} ? no ?