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kill doesn’t just kill programs
you can send ANY signal to a program with kill!
$ kill -SIGNAL PID
(name or number)
which signal kill sends
name num
kill => SIGTERM 15
kill -9 => SIGKILL 9
kill -KILL => SIGKILL 9
kill -HUP => SIGHUP
kill -STOP => SIGSTOP
kill -l lists all signals.
- HUP
- INT
- QUIT
- ILL
- TRAP
- ABRT
- BUS
- FPE
- KILL
- USR1
- SEGV
- USR2
- PIPE
- ALRM
- TERM
- STKFLT
- CHLD
- CONT
- STOP
- TSTP
- TTIN
- TTOU
- URG
- XCPU
- XFS2
- VTALRM
- PROF
- WINCH
- POLL
- PWR
- SYS
killall -SIGNAL NAME
signals all processes called NAME
for example:
$ killall firefox
useful flags:
-w: wait for all signaled processes to die
-i: ask before signalling
pgrep
prints PIDs of matching running programs
pgrep fire matches firefox firebird
NOT bash firefox.sh
To search the whole command line (eg bash firefox.sh), use pgrep -f
pkill
same as pgrep, but signals PIDS found. Example:
$ pkill -f firefox
I use pkill more than killall these days.
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