contd ...

Always try to kill a process with a simple kill command.

   kill process_identifier

This is the cleanest way to kill a process and has the same effect as cancelling a process.

If this does not work use the -1 (one) signal

   kill -1 process_identifier

This tells the process to hangup just as though you were logging out. The system will attempt to kill any child processes.

As a last resort use the -9 signal:

   kill -9 process_identifier

This will stop the process dead in its tracks but it may leave any child processes still running.