4c9e2c0310
linux(4) explicitly states that it is not an emulator. While here, pet mandoc and igor. Reviewed by: mat (mentor), rpokala Approved by: manpages (rpokala), mat (mentor) Differential Revision: https://reviews.freebsd.org/D16375
89 lines
2.7 KiB
Groff
89 lines
2.7 KiB
Groff
.\" 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.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd July 21, 2018
|
|
.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
|
|
file 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.
|
|
Comments can also exist at the end of a line,
|
|
as seen in the
|
|
.Sx EXAMPLES
|
|
section, below.
|
|
.Sh FILES
|
|
.Bl -tag -width /etc/sysctl.conf -compact
|
|
.It Pa /etc/sysctl.conf
|
|
Initial settings for
|
|
.Xr sysctl 8 .
|
|
.El
|
|
.Sh EXAMPLES
|
|
To turn off logging of programs that exit due to fatal signals you may use
|
|
a configuration like
|
|
.Bd -literal -offset indent
|
|
# Configure logging.
|
|
kern.logsigexit=0 # Do not log fatal signal exits (e.g., sig 11)
|
|
.Ed
|
|
.Sh SEE ALSO
|
|
.Xr rc.conf 5 ,
|
|
.Xr rc 8 ,
|
|
.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.
|
|
For example, sysctls to manage the Linux compatibility layer
|
|
.Po
|
|
.Xr linux 4
|
|
.Pc
|
|
cannot be set in
|
|
.Nm
|
|
if the Linux compatibility layer is loaded as a module rather than
|
|
compiled into the kernel.
|