kill [signal] pidis used to destroy or terminate a process whose process id is pid. The pid is found by using the ps command.
kill 1427would terminate the performance meter.
Sometimes, a process needs to be killed, then immediately restarted.
kill -1 1427will send a HUP (Hang Up - kill and restart) signal to process-id 1427.
In some cases, the process will not catch the normal kill interrupt. When that happens, the ``sure kill" is applied:
kill -9 1427will send an interrupt to that process.