SIGTERM vs. SIGKILL - major.io
Sending signals to processes using kill on a Unix system is not a new topic for most systems administrators, but I've been asked many times about the difference between kill and kill -9.
Anytime you use kill on a process, you're actually sending the process a signal (in almost all situations – I'll get into that soon). Standard C applications have a header file that contains the steps that the process should follow if it receives a particular signal. You can get an entire list of the available signals on your system by checking the man page for kill.
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