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+.\" Modified August 3, 2007
+.\" Portions Copyright (c) 2007 Apple Inc.
+.\" Copyright (c) 1999 Chris Costello <chris@FreeBSD.org>
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\" notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\" notice, this list of conditions and the following disclaimer in the
+.\" documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $FreeBSD: src/share/man/man5/sysctl.conf.5,v 1.16 2004/07/03 18:29:23 ru Exp $
+.\"
+.Dd August 3, 2007
+.Dt SYSCTL.CONF 5
+.Os
+.Sh NAME
+.Nm sysctl.conf
+.Nd kernel state defaults
+.Sh DESCRIPTION
+The
+.Pa /etc/sysctl.conf
+file is read in when the system goes into multi-user mode to set default
+settings for the kernel.
+The
+.Pa /etc/sysctl.conf
+is in the format of the
+.Xr sysctl 8
+command, i.e.\&
+.Bd -literal -offset indent
+sysctl_mib=value
+.Ed
+.Pp
+Comments are denoted by a
+.Dq #
+at the beginning of a line.
+.Sh FILES
+.Bl -tag -width /etc/sysctl.conf -compact
+.It Pa /etc/sysctl.conf
+Initial settings for
+.Xr sysctl 8 .
+.El
+.Sh EXAMPLES
+To disable coredumps, you may use a configuration like:
+.Bd -literal -offset indent
+# Disable coredumps.
+kern.coredump=0
+.Ed
+.Sh SEE ALSO
+.Xr sysctl 8
+.Sh HISTORY
+The
+.Nm
+file appeared in
+.Fx 4.0 .
+.Sh BUGS
+If loadable kernel modules are used to introduce additional kernel
+functionality and sysctls to manage that functionality,
+.Nm
+may be processed too early in the boot process to set those sysctls.