Due to performance issues on a server, a Linux administrator needs to terminate an unresponsive process. Which of the following commands should the administrator use to terminate the process immediately without waiting for a graceful shutdown?
SIGINT 2 Signals when the Linux user presses ‘CONTROL-C’
SIGHUP 1 Hangs up signals when controlling the terminal or at the end of the controlling processes.
SIGQUIT 3 Signals when the Linux user presses ‘CONTROL-D’
SIGFPE 8 Signals when any unexpected mathematical operation is performed.
SIGKILL 9 When any of the process issues this signal, it will quit immediately.
SIGALRM 14 Signals for an alarm clock
SIGTERM 15 Signals to terminate the process or the software.
SIGSTOP 17,19,23 Signals to stop the process in Linux.
And now:
The SIGKILL is used for immediate termination of a process. This signal cannot be ignored.
The SIGTERM can be referred as a soft kill because the process that receives the SIGTERM signal may choose to ignore it.
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