kill [-#] PID [PID ...]

Kill sends a signal to one or more processes specified by their process ID's (PID) on the command line. By default the TERM signal is sent to the processes. An option signal number may be specified by a leading dash as in -9 for signal # 9. TERM sometimes kills a process, but signal # 9 is guaranteed to kill em dead.

Examples:

1. Send the kill signal to process # 15059:
   kill -9 15059

2. Kill processes 1530 and 16728:
   kill -9 1530 16728