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kill(1) [v7 man page]

KILL(1) 						      General Commands Manual							   KILL(1)

kill - terminate a process with extreme prejudice SYNOPSIS
kill [ -signo ] processid ... DESCRIPTION
Kill sends signal 15 (terminate) to the specified processes. If a signal number preceded by `-' is given as first argument, that signal is sent instead of terminate (see signal(2)). This will kill processes that do not catch the signal; in particular `kill -9 ...' is a sure kill. By convention, if process number 0 is specified, all members in the process group (i.e. processes resulting from the current login) are signaled. The killed processes must belong to the current user unless he is the super-user. To shut the system down and bring it up single user the super-user may use `kill -1 1'; see init(8). The process number of an asynchronous process started with `&' is reported by the shell. Process numbers can also be found by using ps(1). SEE ALSO
ps(1), kill(2), signal(2) KILL(1)

Check Out this Related Man Page

KILL(2) 							System Calls Manual							   KILL(2)

kill - send signal to a process SYNOPSIS
kill(pid, sig); DESCRIPTION
Kill sends the signal sig to the process specified by the process number in r0. See signal(2) for a list of signals. The sending and receiving processes must have the same effective user ID, otherwise this call is restricted to the super-user. If the process number is 0, the signal is sent to all other processes in the sender's process group; see tty(4). If the process number is -1, and the user is the super-user, the signal is broadcast universally except to processes 0 and 1, the scheduler and initialization processes, see init(8). Processes may send signals to themselves. SEE ALSO
signal(2), kill(1) DIAGNOSTICS
Zero is returned if the process is killed; -1 is returned if the process does not have the same effective user ID and the user is not super-user, or if the process does not exist. ASSEMBLER
(kill = 37.) (process number in r0) sys kill; sig KILL(2)
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