Kill a Running Process in Ubuntu or any Linux Distro using Terminal


How to kill a running process

Open the Terminal

Type: ps aux and press enter.

long series of processes will appear in your Terminal.

look for the application you want to kill

find that process, you can see a PID number, example 3225

Now kill that process, type: sudo kill -9 process number (replaced ‘process number’ with the actual number) and then press enter. 

example sudo kill -9 3225


resource : How to Kill a Running Process