renice - alter priority of running processes
To change the priority of the running process.
$ sudo renice -n <nice_value> -p <pid_of_the_process>
$ renice -n 10 -p <PID>
To change the priority of all programs of a specific group with group id 5
to 15
$ renice -n 15 -g 5
To change the priority of all programs of a specific user 3 to 15
$ sudo renice -n 15 -u 3
regards,
T.Dhanasekar