Linux and Unix kill command
kill [-s] [-l] %pid
The default signal for kill is TERM (which will terminate or "kill" the process). 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 (process ID) values may be used to choose whole process groups; see the PGID column in the output of the ps command. A PID of -1 is special; it indicates all processes except two: the kill process itself, and init.
|pid [...]||Send a signal to every pid listed.|
|Specify the signal to be sent. The signal can be specified by using name or number. The behavior of signals, and their identifying names, are listed on our signals page.|
|-l, --list [signal]||List signal names. This option has optional argument, which will convert signal number to signal name, or other way around.|
|-L, --table||List signal names in a nice table.|
kill -9 -1
Kills all processes possible to be killed.
kill -l 11
Translates signal number 11 into its signal name.
Lists the available signal choices in a tabular format.
kill 123 543 2341 3453
Sends the default signal (TERM) to the processes with IDs 123, 543, 2341, and 3453, terminating those processes.