1.\"- 2.\" Copyright (c) 1980, 1990, 1993 3.\" The Regents of the University of California. All rights reserved. 4.\" 5.\" This code is derived from software contributed to Berkeley by 6.\" the Institute of Electrical and Electronics Engineers, Inc. 7.\" 8.\" Redistribution and use in source and binary forms, with or without 9.\" modification, are permitted provided that the following conditions 10.\" are met: 11.\" 1. Redistributions of source code must retain the above copyright 12.\" notice, this list of conditions and the following disclaimer. 13.\" 2. Redistributions in binary form must reproduce the above copyright 14.\" notice, this list of conditions and the following disclaimer in the 15.\" documentation and/or other materials provided with the distribution. 16.\" 3. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)kill.1 8.2 (Berkeley) 4/28/95 33.\" 34.Dd October 3, 2016 35.Dt KILL 1 36.Os 37.Sh NAME 38.Nm kill 39.Nd terminate or signal a process 40.Sh SYNOPSIS 41.Nm 42.Op Fl s Ar signal_name 43.Ar pid ... 44.Nm 45.Fl l 46.Op Ar exit_status 47.Nm 48.Fl Ar signal_name 49.Ar pid ... 50.Nm 51.Fl Ar signal_number 52.Ar pid ... 53.Sh DESCRIPTION 54The 55.Nm 56utility sends a signal to the processes specified by the 57.Ar pid 58operands. 59.Pp 60Only the super-user may send signals to other users' processes. 61.Pp 62The options are as follows: 63.Bl -tag -width indent 64.It Fl s Ar signal_name 65A symbolic signal name specifying the signal to be sent instead of the 66default 67.Dv TERM . 68.It Fl l Op Ar exit_status 69If no operand is given, list the signal names; otherwise, write 70the signal name corresponding to 71.Ar exit_status . 72.It Fl Ar signal_name 73A symbolic signal name specifying the signal to be sent instead of the 74default 75.Dv TERM . 76.It Fl Ar signal_number 77A non-negative decimal integer, specifying the signal to be sent instead 78of the default 79.Dv TERM . 80.El 81.Pp 82The following PIDs have special meanings: 83.Bl -tag -width indent 84.It -1 85If superuser, broadcast the signal to all processes; otherwise broadcast 86to all processes belonging to the user. 87.El 88.Pp 89Some of the more commonly used signals: 90.Pp 91.Bl -tag -width indent -compact 92.It 1 93HUP (hang up) 94.It 2 95INT (interrupt) 96.It 3 97QUIT (quit) 98.It 6 99ABRT (abort) 100.It 9 101KILL (non-catchable, non-ignorable kill) 102.It 14 103ALRM (alarm clock) 104.It 15 105TERM (software termination signal) 106.El 107.Pp 108Some shells may provide a builtin 109.Nm 110command which is similar or identical to this utility. 111Consult the 112.Xr builtin 1 113manual page. 114.Sh EXIT STATUS 115.Ex -std 116.Sh EXAMPLES 117Terminate 118the processes with PIDs 142 and 157: 119.Pp 120.Dl "kill 142 157" 121.Pp 122Send the hangup signal 123.Pq Dv SIGHUP 124to the process with PID 507: 125.Pp 126.Dl "kill -s HUP 507" 127.Pp 128Terminate the process group with PGID 117: 129.Pp 130.Dl "kill -- -117" 131.Sh SEE ALSO 132.Xr builtin 1 , 133.Xr csh 1 , 134.Xr killall 1 , 135.Xr ps 1 , 136.Xr sh 1 , 137.Xr kill 2 , 138.Xr sigaction 2 139.Sh STANDARDS 140The 141.Nm 142utility is expected to be 143.St -p1003.2 144compatible. 145.Sh HISTORY 146A 147.Nm 148command appeared in 149.At v3 150in section 8 of the manual. 151.Sh BUGS 152A replacement for the command 153.Dq Li kill 0 154for 155.Xr csh 1 156users should be provided. 157