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.\" $FreeBSD$ 34.\" 35.Dd October 3, 2016 36.Dt KILL 1 37.Os 38.Sh NAME 39.Nm kill 40.Nd terminate or signal a process 41.Sh SYNOPSIS 42.Nm 43.Op Fl s Ar signal_name 44.Ar pid ... 45.Nm 46.Fl l 47.Op Ar exit_status 48.Nm 49.Fl Ar signal_name 50.Ar pid ... 51.Nm 52.Fl Ar signal_number 53.Ar pid ... 54.Sh DESCRIPTION 55The 56.Nm 57utility sends a signal to the processes specified by the 58.Ar pid 59operands. 60.Pp 61Only the super-user may send signals to other users' processes. 62.Pp 63The options are as follows: 64.Bl -tag -width indent 65.It Fl s Ar signal_name 66A symbolic signal name specifying the signal to be sent instead of the 67default 68.Dv TERM . 69.It Fl l Op Ar exit_status 70If no operand is given, list the signal names; otherwise, write 71the signal name corresponding to 72.Ar exit_status . 73.It Fl Ar signal_name 74A symbolic signal name specifying the signal to be sent instead of the 75default 76.Dv TERM . 77.It Fl Ar signal_number 78A non-negative decimal integer, specifying the signal to be sent instead 79of the default 80.Dv TERM . 81.El 82.Pp 83The following PIDs have special meanings: 84.Bl -tag -width indent 85.It -1 86If superuser, broadcast the signal to all processes; otherwise broadcast 87to all processes belonging to the user. 88.El 89.Pp 90Some of the more commonly used signals: 91.Pp 92.Bl -tag -width indent -compact 93.It 1 94HUP (hang up) 95.It 2 96INT (interrupt) 97.It 3 98QUIT (quit) 99.It 6 100ABRT (abort) 101.It 9 102KILL (non-catchable, non-ignorable kill) 103.It 14 104ALRM (alarm clock) 105.It 15 106TERM (software termination signal) 107.El 108.Pp 109Some shells may provide a builtin 110.Nm 111command which is similar or identical to this utility. 112Consult the 113.Xr builtin 1 114manual page. 115.Sh EXIT STATUS 116.Ex -std 117.Sh EXAMPLES 118Terminate 119the processes with PIDs 142 and 157: 120.Pp 121.Dl "kill 142 157" 122.Pp 123Send the hangup signal 124.Pq Dv SIGHUP 125to the process with PID 507: 126.Pp 127.Dl "kill -s HUP 507" 128.Pp 129Terminate the process group with PGID 117: 130.Pp 131.Dl "kill -- -117" 132.Sh SEE ALSO 133.Xr builtin 1 , 134.Xr csh 1 , 135.Xr killall 1 , 136.Xr ps 1 , 137.Xr sh 1 , 138.Xr kill 2 , 139.Xr sigaction 2 140.Sh STANDARDS 141The 142.Nm 143utility is expected to be 144.St -p1003.2 145compatible. 146.Sh HISTORY 147A 148.Nm 149command appeared in 150.At v3 151in section 8 of the manual. 152.Sh BUGS 153A replacement for the command 154.Dq Li kill 0 155for 156.Xr csh 1 157users should be provided. 158