Stop an application through terminal [closed]

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I am using Ubuntu and i would like to stop a running application from terminal, more precisely through a script. One way is to get the pid of the process and issue a kill command with the pid of the process. But how do i get the pid of running applications? Or is there any better way to do this?

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you can use

ps -ax | grep application name if your searching for firefox type below command

ps -ax | grep firefox

it shows the processing id of corresponding applications you can stop that application by kill command if process id=1317,

kill -9 1317 

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How to stop an application from opening at start?

You will have to type ps -A and Enter.

After that you will get a list of every app that that is starting by itself.

kill -9  (the number of the app)

Send me a message it that does not help you.

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If you know the name of the application:

$ pidof "name of application" (This will return the pid of that application)  
$ kill -9 "pid"

Here is a basic bash script I wrote:

#!/bin/bash
PID=`pidof start_program`
kill $PID

"start_program" is the name of the application running.

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ps -ef | grep application name

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pkill will probably cover your use case.

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Or is there any better way to do this?

Depends on the application. Some applications write their PID to a file.