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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 sysvinit tools kills all processes that the user is able to kill, potentially shutting down the system if run by root.
The implementation supplied with the FreeBSD (including Mac OS X) and Linux 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 named xmms:

killall xmms

External links

Unix command-line interface programs and shell builtins

Unix command-line interface programs and shell builtins
File system	cat chattr chmod chown chgrp cksum cmp cp dd du df file fuser ln ls mkdir mv pax pwd rm rmdir split tee touch type umask
Processes	at bg crontab fg kill nice ps time
User environment	env exit logname mesg talk tput uname who write
Text processing	awk basename comm csplit cut diff dirname ed ex fold head iconv join m4 more nl paste patch printf read sed sort strings tail tr troff uniq vi wc xargs
Shell builtins	alias cd echo test unset wait
Searching	find grep
Documentation	man
Software development	ar ctags lex make nm strip yacc
Miscellaneous	bc cal expr lp od sleep true and false
Categories Standard Unix programs Unix SUS2008 utilities List