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kill - send a signal to a process
kill [options] <pid> [...]
The default signal for kill is TERM. Use -l or -L to list
available signals. Particularly useful signals include HUP, INT, KILL, STOP,
CONT, and 0. Alternate signals may be specified in three ways: -9,
-SIGKILL or -KILL. Negative PID values may be used to choose
whole process groups; see the PGID column in ps command output. A PID of
-1 is special; it indicates all processes except the kill process
itself and init.
- <pid> [...]
- Send signal to every <pid> listed.
- -s <signal>
- --signal <signal>
- Specify the signal to be sent. The signal can be specified by using
name or number. The behavior of signals is explained in signal(7)
- -q, --queue value
- Use sigqueue(3) rather than kill(2) and the value argument
is used to specify an integer to be sent with the signal. If the receiving
process has installed a handler for this signal using the SA_SIGINFO flag
to sigaction(2) , then it can obtain this data via the si_value
field of the siginfo_t structure.
- -l, --list [signal]
- List signal names. This option has optional argument, which will convert
signal number to signal name, or other way round.
- -L, --table
- List signal names in a nice table.
Your shell (command line interpreter) may have a built-in kill command. You may
need to run the command described here as /bin/kill to solve the conflict.
- kill -9 -1
- Kill all processes you can kill.
- kill -l 11
- Translate number 11 into a signal name.
- kill -L
- List the available signal choices in a nice table.
- kill 123 543 2341 3453
- Send the default signal, SIGTERM, to all those processes.
This command meets appropriate standards. The -L flag is Linux-specific.
Albert Cahalan wrote kill in
1999 to replace a bsdutils one that was not standards compliant. The
util-linux one might also work correctly.