Killall

Killall

killall is a command line utility available on Unix-like systems. There are two very different implementations.

* The implementation supplied with genuine UNIX System V (including Solaris) and with the Linux [ftp://ftp.cistron.nl/pub/people/miquels/sysvinit/ sysvinit] tools (as killall5) is a particularly dangerous command that kills all processes that the user is able to kill, effectively shutting down the system if run by root.
* The implementation supplied with the FreeBSD and Linux [http://psmisc.sourceforge.net/ psmisc] tools is similar to the pkill and skill commands, killing only the processes specified on the command line.

Both commands operate by sending a signal, like the kill program.

Example usage

Kill all processes (UNIX System V version) killall

List all signals (FreeBSD/Linux version) killall -l

Send the USR1 signal to the dd process (FreeBSD/Linux version) killall -s USR1 dd

Kill a process which is not responding (FreeBSD/Linux version) killall -9 dd

The numeric argument specifies a signal to send to the process. In this case, the command sends signal 9 to the process, which is SIGKILL, as opposed to the default SIGTERM.

See also

* List of Unix programs
*Signals
*pidof

External links

*man|1|killall|Linux|kill processes by name
* [http://www.freebsd.org/cgi/man.cgi?query=killall&sektion=1 FreeBSD killall man page]


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