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Sending Signals To Multiple Processes With killall

It's also possible to send signals to multiple processes matching a specified program or username by using the killall command. Here is the syntax:

killall [-u user] [-signal] name...

killall [-u user] [-signal] name...

To demonstrate, we will start a couple of instances of the xlogo program and then ter- minate them:

[me@linuxbox ~]$ xlogo &

[1] 18801

[me@linuxbox ~]$ xlogo &

[2] 18802

[me@linuxbox ~]$ killall xlogo

[1]- Terminated xlogo

[2]+ Terminated xlogo

[me@linuxbox ~]$ xlogo &

[1] 18801

[me@linuxbox ~]$ xlogo &

[2] 18802

[me@linuxbox ~]$ killall xlogo

[1]- Terminated xlogo

[2]+ Terminated xlogo

Remember, as with kill, you must have superuser privileges to send signals to pro- cesses that do not belong to you.

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