KILL(1) NetBSD General Commands Manual KILL(1)
kill -- terminate or signal a process
kill [-s signal_name] pid ... kill -l [exit_status] kill -signal_name pid ... kill -signal_number pid ...
The kill utility sends a signal to the process(es) specified by the pid operand(s). Only the super-user may send signals to other users' processes. The options are as follows: -s signal_name A symbolic signal name specifying the signal to be sent instead of the default TERM. -l [exit_status] Display the name of the signal corresponding to exit_status. exit_status may be the exit status of a command killed by a sig- nal (see the special sh(1) parameter `?') or a signal number. If no operand is given, display the names of all the signals. -signal_name A symbolic signal name specifying the signal to be sent instead of the default TERM. -signal_number A non-negative decimal integer, specifying the signal to be sent instead of the default TERM. The following pids have special meanings: -1 If superuser, broadcast the signal to all processes; otherwise broadcast to all processes belonging to the user. 0 Broadcast the signal to all processes in the current process group belonging to the user. Some of the more commonly used signals: 0 0 (does not affect the process; can be used to test whether the process exists) 1 HUP (hang up) 2 INT (interrupt) 3 QUIT (quit) 6 ABRT (abort) 9 KILL (non-catchable, non-ignorable kill) 14 ALRM (alarm clock) 15 TERM (software termination signal) 17 STOP (non-catchable, non-ignorable, causes process to temporarily stop, after which it can later be resumed using SIGCONT) 19 CONT (stopped proceses resume execution) kill is a built-in to most shells, including sh(1) and csh(1); it allows job specifiers of the form ``%...'' as arguments so process id's are not as often used as kill arguments. See csh(1) or sh(1) for details.
The kill utility exits 0 on success, and >0 if an error occurs.
csh(1), pgrep(1), pkill(1), ps(1), sh(1), kill(2), sigaction(2), signal(7)
The kill utility is expected to be IEEE Std 1003.2 (``POSIX.2'') compati- ble.
A kill command appeared in Version 3 AT&T UNIX in section 8 of the man- ual. NetBSD 9.0 May 6, 2020 NetBSD 9.0
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