How to change the priority of a process? Why would you want to do that?

To change the priority of a process, you can use the nice command in Linux. The nice command allows you to specify the priority of a process by assigning a priority value ranging from -20 to 19. A higher value of priority means lower priority for the process, and vice versa.

You may want to change the priority of a process to adjust the amount of CPU time it is allocated by the system scheduler. For example, if you have a CPU-intensive process running on your system that is slowing down other processes, you can lower its priority to give more CPU time to other processes.