1.\" $NetBSD: sysctl.conf.5,v 1.3 2009/05/13 22:57:34 wiz Exp $ 2.\" 3.\" Copyright (c) 2007 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 16.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 17.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 18.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 19.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25.\" POSSIBILITY OF SUCH DAMAGE. 26.\" 27.Dd October 4, 2007 28.Dt SYSCTL.CONF 5 29.Os 30.Sh NAME 31.Nm sysctl.conf 32.Nd sysctl configuration file 33.Sh SYNOPSIS 34.Nm 35.Sh DESCRIPTION 36The 37.Nm 38file defines the 39.Xr sysctl 7 40kernel state tunables that can be set at boot time using 41.Xr sysctl 8 42(using the 43.Fl f 44switch) 45via the 46.Pa /etc/rc.d/sysctl 47startup script. 48.Pp 49The state to be set is described using a 50.Dq Management Information Base 51.Pq Dq MIB 52style name. 53The MIB and value must be separated by 54.Sq = 55with no whitespace, for example: 56.Pp 57.Ar name Ns Li = Ns Ar value 58.Pp 59Blank lines, lines with just 60.Ar name , 61and comments (beginning with 62.Sq # ) 63are ignored. 64Line continuations using backslash 65.Sq \e 66are permitted. 67Only integral and string values can be set. 68.\" 69.Sh FILES 70.Bl -tag -width /etc/sysctl.conf -compact 71.It Pa /etc/sysctl.conf 72The file 73.Nm 74resides in 75.Pa /etc . 76.El 77.Sh EXAMPLES 78The following is an example 79.Pa /etc/sysctl.conf 80file: 81.Pp 82.Bd -literal 83# Change max open files 84kern.maxfiles=1792 85 86# Run Veriexec in IDS mode 87kern.veriexec.strict=1 88 89# Enable IP packet forwarding 90net.inet.ip.forwarding=1 91.Ed 92.Sh SEE ALSO 93.Xr sysctl 3 , 94.Xr rc.conf 5 , 95.Xr sysctl 7 , 96.Xr sysctl 8 97.Sh HISTORY 98Support for 99.Nm 100first appeared in 101.Nx 1.5 . 102