Signals - 2

You can send signals to any process that you own.
The default action of most signals is to terminate the process. (Some, like WINCH, are ignored)
A program can execute its own functions ("signal handlers") upon receiving a signal. (eg clean up/delete temporary files/reset terminal settings). KILL and STOP cannot be trapped.
Useful Commands:
top
kill
Help:
man 1 kill
man 7 signal