(non-catchable, non-ignorable kill) – Kill unconditionally, Cannot be caught, blocked or ignored by the process. The word “Aborted” is echoed in the terminal when the signal is received. SIGABRT is typically sent by the process itself to itself using the abort function of the C standard library, but it can also be sent to the process by other users or commands. The word “Quit” is echoed in the terminal running the process. SIGQUIT is sent to a process by the controlling terminal while also requesting a core dump be performed. Using SIGINT has the benefit of terminating the process as well as all other commands running in that terminal. This is the same thing as using control-c.
This is a signal sent to a process by its controlling terminal by the user who is running the process. Typically, this means a ssh terminal is closed or GUI terminal HUP is short for Hang Up. (hang up) – sent to a process whose controlling terminal is closed. While there are 32 signals that can be used, below is a list of the more common signals that you may see: Signal Code Number Signals can be specified using a the Signal Number or Signal Character Name. But what you may not know is that killing a process isn’t always a matter of killing a process, but signaling to the process to shut itself down or self-terminate.Ĭommands such as kill and killall send signals to running processes. Amongst those 32, you may recognize some of the more common ones: SIGTERM, SIGHUP, and SIGKILL. The linux kernel has at least 32 signals. Killing Linux Processes with TERM Signalsįrom time to time, if you are a Linux Administrator, you will have to kill a linux process.
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