evilytwisted@evilytwisted-desktop ~ $ kill -9 3431
evilytwisted@evilytwisted-desktop ~ $ ps aux | grep jack
1000      3645  0.0  0.0   4396   612 ?        S    21:50   0:00 /bin/sh /usr/bin/qjackctl
1000      3651  1.1  0.5 731712 48592 ?        Sl   21:50   0:04 /usr/lib/qjackctl/qjackctl.real
1000      3849  0.0  0.0  13580   888 pts/2    S+   21:57   0:00 grep --colour=auto jack
evilytwisted@evilytwisted-desktop ~ $ kill -9 3645
evilytwisted@evilytwisted-desktop ~ $ kill -9 3651
evilytwisted@evilytwisted-desktop ~ $ kill -9 3849
bash: kill: (3849) - No such process
evilytwisted@evilytwisted-desktop ~ $ ps aux | grep jack
1000      3856  0.0  0.0  13580   888 pts/2    S+   21:57   0:00 grep --colour=auto jack
evilytwisted@evilytwisted-desktop ~ $ kill -9 3856
bash: kill: (3856) - No such process
evilytwisted@evilytwisted-desktop ~ $ ps aux | grep jack
1000      3861  0.0  0.0  13580   884 pts/2    S+   21:57   0:00 grep --colour=auto jack
evilytwisted@evilytwisted-desktop ~ $ kill -9 3851
bash: kill: (3851) - No such process
evilytwisted@evilytwisted-desktop ~ $ ps aux | grep jack
1000      3866  0.0  0.0  13580   888 pts/2    S+   21:58   0:00 grep --colour=auto jack
evilytwisted@evilytwisted-desktop ~ $ kill -9 3866
bash: kill: (3866) - No such process
evilytwisted@evilytwisted-desktop ~ $