111 lines
4.5 KiB
XML
111 lines
4.5 KiB
XML
<?xml version="1.0"?>
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<!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!--
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This file is part of systemd.
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Copyright 2011 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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-->
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<refentry id="sysctl.d">
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<refentryinfo>
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<title>sysctl.d</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Lennart</firstname>
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<surname>Poettering</surname>
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<email>lennart@poettering.net</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>sysctl.d</refentrytitle>
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<manvolnum>5</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>sysctl.d</refname>
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<refpurpose>Configure kernel parameters at boot</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename>/usr/lib/sysctl.d/*.conf</filename></para>
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<para><filename>/etc/sysctl.d/*.conf</filename></para>
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<para><filename>/run/sysctl.d/*.conf</filename></para>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para><command>systemd</command> uses configuration files
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from the above directories to configure
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<citerefentry><refentrytitle>sysctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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kernel parameters to load during boot.</para>
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</refsect1>
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<refsect1>
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<title>Configuration Format</title>
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<para>The configuration files should simply contain a
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list of variable assignments, separated by
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newlines. Empty lines and lines whose first
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non-whitespace character is # or ; are ignored.</para>
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<para>Note that both / and . are accepted as
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separators in sysctl variable names.</para>
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<para>Each configuration file is named in the style of
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<filename><program>.conf</filename>.
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Files in <filename>/etc/</filename> overwrite
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files with the same name in <filename>/usr/lib/</filename>.
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Files in <filename>/run</filename> overwrite files with
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the same name in <filename>/etc/</filename> and
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<filename>/usr/lib/</filename>. Packages should install their
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configuration files in <filename>/usr/lib/</filename>, files
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in <filename>/etc/</filename> are reserved for the local
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administration, which possibly decides to overwrite the
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configurations installed from packages. All files are sorted
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by filename in alphabetical order, regardless in which of the
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directories they reside, to ensure that a specific
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configuration file takes precedence over another file with
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an alphabetically later name.</para>
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</refsect1>
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<refsect1>
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<title>Example</title>
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<example>
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<title>/etc/sysctl.d/domain-name.conf example:</title>
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<programlisting># Set kernel YP domain name
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kernel.domainname=example.com</programlisting>
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</example>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sysctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sysctl.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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