Killall and Killall-9

SIGINT sigterm SIGKILL

CTRL + C send SIGINT
Killall send sigterm;

killall-9 send Sigkill;

All three are end/terminate process runs.

1.SIGINT sigterm Difference

The former is associated with the character Ctrl + C, which has no control character Association.

The former can only end the foreground process, the latter is not.

The difference of 2.SIGTERM Sigkill

The former can be blocked, processed, and ignored, but the latter cannot be used. The default signal sent by the kill command with no parameters is sigterm. Let the program have a good exit. Because it can be blocked, so some process can not be ended, use Kill to send the latter signal, you can. That is: kill-9 process number.

SIGKILL Sigstop cannot be captured.