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Unix Manual [kill]

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UNIX Manual | Commands
							KILL(1)			   Linux Programmer's Manual		       KILL(1)

       kill - terminate a process

       kill [-s signal|-p] [--] pid...
       kill -l [signal]

       The command kill sends the specified signal to the specified process or
       process group.  If no signal is specified, the  TERM  signal  is	 sent.
       The  TERM  signal  will	kill processes which do not catch this signal.
       For other processes, it may be necessary to use the  KILL  (9)  signal,
       since this signal cannot be caught.

       Most  modern  shells  have a builtin kill function, with a usage rather
       similar to that of the  command	described  here.  The  '-a'  and  '-p'
       options, and the possibility to specify pids by command name is a local

       If sig is 0, then no signal is sent, but error checking is  still  per-

       pid... Specify the list of processes that kill should signal.  Each pid
	      can be one of five things:

	      n	     where n is larger than 0.	The process with pid n will be

	      0	     All  processes in the current process group are signaled.

	      -1     All processes with pid larger than 1 will be signaled.

	      -n     where n is larger than 1.	All processes in process group
		     n	are  signaled.	 When  an argument of the form '-n' is
		     given, and it is meant to denote a process group,	either
		     the  signal must be specified first, or the argument must
		     be preceded by a '--' option, otherwise it will be	 taken
		     as the signal to send.

		     All processes invoked using that name will be signaled.

       -s signal
	      Specify the signal to send.  The signal may be given as a signal
	      name or number.

       -l     Print  a	list  of   signal   names.    These   are   found   in

       -a     Do  not  restrict the commandname-to-pid conversion to processes
	      with the same uid as the present process.

       -p     Specify that kill should only print the process id (pid) of  the
	      named processes, and not send any signals.

       It  is not possible to send a signal to explicitly selected thread in a
       multithreaded process by kill(2) syscall.  If kill(2) is used to send a
       signal  to  a thread group, then kernel selects arbitrary member of the
       thread group that has not blocked the signal.   For  more  details  see
       clone(2) CLONE_THREAD description.

       The  command kill(1) as well as syscall kill(2) accepts TID (thread ID,
       see gettid(2)) as argument.  In this case  the  kill  behavior  is  not
       changed	and  the  signal  is also delivered to the thread group rather
       than to the specified thread.

       bash(1), tcsh(1), kill(2), sigvec(2), signal(7)

       Taken from BSD 4.4.  The ability to translate process names to  process
       ids was added by Salvatore Valente <>.

       The  kill command is part of the util-linux-ng package and is available

Linux Utilities			14 October 1994			       KILL(1)							
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