Linux Pocket Guide, 2nd Edition

Controlling Processes

kill	Terminate a process (or send it a signal).
nice	Invoke a program at a particular priority.
renice	Change a process’s priority as it runs.

Once processes are started, they can be stopped, restarted, killed, and reprioritized. We discussed some of these operations as handled by the shell in Shell Job Control. Now we cover killing and reprioritizing.