killall command

we can use killall to terminate processes that have a specific file open at that time by just mentioning the file name. Some of the most useful options for killall are listed here:

-i : This option puts killall in interactive mode. You’ll have to confirm before any process is killed.


-r : This option allows you to work with regular expressions. This is useful because you won’t have to enter the exact process name.

-u : This option kills only processes that a specific user owns. Useful if you need to terminate everything a user is doing right now.

EX:-

if you need to terminate all http processes, use regular expressions as in the following command:

killall -r http


For example, if you want to kill all processes that a user has currently opened, use the following command:

killall -u username


it is mainly used to kill a process and all its children
ex:- killall pid