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.Dd October 3, 2016 33.Dt KILL 1 34.Os 35.Sh NAME 36.Nm kill 37.Nd terminate or signal a process 38.Sh SYNOPSIS 39.Nm 40.Op Fl s Ar signal_name 41.Ar pid ... 42.Nm 43.Fl l 44.Op Ar exit_status 45.Nm 46.Fl Ar signal_name 47.Ar pid ... 48.Nm 49.Fl Ar signal_number 50.Ar pid ... 51.Sh DESCRIPTION 52The 53.Nm 54utility sends a signal to the processes specified by the 55.Ar pid 56operands. 57.Pp 58Only the super-user may send signals to other users' processes. 59.Pp 60The options are as follows: 61.Bl -tag -width indent 62.It Fl s Ar signal_name 63A symbolic signal name specifying the signal to be sent instead of the 64default 65.Dv TERM . 66.It Fl l Op Ar exit_status 67If no operand is given, list the signal names; otherwise, write 68the signal name corresponding to 69.Ar exit_status . 70.It Fl Ar signal_name 71A symbolic signal name specifying the signal to be sent instead of the 72default 73.Dv TERM . 74.It Fl Ar signal_number 75A non-negative decimal integer, specifying the signal to be sent instead 76of the default 77.Dv TERM . 78.El 79.Pp 80The following PIDs have special meanings: 81.Bl -tag -width indent 82.It -1 83If superuser, broadcast the signal to all processes; otherwise broadcast 84to all processes belonging to the user. 85.El 86.Pp 87Some of the more commonly used signals: 88.Pp 89.Bl -tag -width indent -compact 90.It 1 91HUP (hang up) 92.It 2 93INT (interrupt) 94.It 3 95QUIT (quit) 96.It 6 97ABRT (abort) 98.It 9 99KILL (non-catchable, non-ignorable kill) 100.It 14 101ALRM (alarm clock) 102.It 15 103TERM (software termination signal) 104.El 105.Pp 106Some shells may provide a builtin 107.Nm 108command which is similar or identical to this utility. 109Consult the 110.Xr builtin 1 111manual page. 112.Sh EXIT STATUS 113.Ex -std 114.Sh EXAMPLES 115Terminate 116the processes with PIDs 142 and 157: 117.Pp 118.Dl "kill 142 157" 119.Pp 120Send the hangup signal 121.Pq Dv SIGHUP 122to the process with PID 507: 123.Pp 124.Dl "kill -s HUP 507" 125.Pp 126Terminate the process group with PGID 117: 127.Pp 128.Dl "kill -- -117" 129.Sh SEE ALSO 130.Xr builtin 1 , 131.Xr csh 1 , 132.Xr killall 1 , 133.Xr ps 1 , 134.Xr sh 1 , 135.Xr kill 2 , 136.Xr sigaction 2 137.Sh STANDARDS 138The 139.Nm 140utility is expected to be 141.St -p1003.2 142compatible. 143.Sh HISTORY 144A 145.Nm 146command appeared in 147.At v3 148in section 8 of the manual. 149.Sh BUGS 150A replacement for the command 151.Dq Li kill 0 152for 153.Xr csh 1 154users should be provided. 155