To stop a process in Ubuntu Linux, you can use the kill command in the terminal. The basic syntax is:
kill [SIGNAL] PID
Where SIGNAL is the signal you want to send to the process, and PID is the process ID of the process you want to stop. By default, the kill command sends the SIGTERM signal, which tells the process to gracefully shut down.
If the process is not responding to the SIGTERM signal, you can send the SIGKILL signal, which forces the process to shut down immediately, using the following command:
kill -9 PID
To find the PID of the process you want to stop, use the ps command, which lists all running processes, or the top command, which shows a real-time view of running processes.