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Diffstat (limited to 'man/sysctl.d.xml')
| -rw-r--r-- | man/sysctl.d.xml | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/man/sysctl.d.xml b/man/sysctl.d.xml new file mode 100644 index 0000000000..69aac8cab7 --- /dev/null +++ b/man/sysctl.d.xml @@ -0,0 +1,127 @@ +<?xml version="1.0"?> +<!--*-nxml-*--> +<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> +<!-- + This file is part of systemd. + + Copyright 2011 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +--> +<refentry id="sysctl.d"> + + <refentryinfo> + <title>sysctl.d</title> + <productname>systemd</productname> + + <authorgroup> + <author> + <contrib>Developer</contrib> + <firstname>Lennart</firstname> + <surname>Poettering</surname> + <email>lennart@poettering.net</email> + </author> + </authorgroup> + </refentryinfo> + + <refmeta> + <refentrytitle>sysctl.d</refentrytitle> + <manvolnum>5</manvolnum> + </refmeta> + + <refnamediv> + <refname>sysctl.d</refname> + <refpurpose>Configure kernel parameters at boot</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <para><filename>/etc/sysctl.d/*.conf</filename></para> + <para><filename>/run/sysctl.d/*.conf</filename></para> + <para><filename>/usr/lib/sysctl.d/*.conf</filename></para> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para>At boot, + <citerefentry><refentrytitle>systemd-sysctl.service</refentrytitle><manvolnum>8</manvolnum></citerefentry> + reads configuration files from the above directories + to configure + <citerefentry><refentrytitle>sysctl</refentrytitle><manvolnum>8</manvolnum></citerefentry> + kernel parameters.</para> + </refsect1> + + <refsect1> + <title>Configuration Format</title> + + <para>The configuration files contain a list of + variable assignments, separated by newlines. Empty + lines and lines whose first non-whitespace character + is # or ; are ignored.</para> + + <para>Note that both / and . are accepted as label + separators within sysctl variable + names. <literal>kernel.domainname=foo</literal> and + <literal>kernel/domainname=foo</literal> hence are + entirely equivalent.</para> + + <para>Each configuration file shall be named in the + style of <filename><program>.conf</filename>. + Files in <filename>/etc/</filename> override files + with the same name in <filename>/usr/lib/</filename> + and <filename>/run/</filename>. Files in + <filename>/run/</filename> override files with the same + name in <filename>/usr/lib/</filename>. Packages + should install their configuration files in + <filename>/usr/lib/</filename>. Files in + <filename>/etc/</filename> are reserved for the local + administrator, who may use this logic to override the + configuration files installed by vendor packages. All + configuration files are sorted by their filename in + alphabetical order, regardless in which of the + directories they reside, to guarantee that a specific + configuration file takes precedence over another file + with an alphabetically earlier name, if both files + contain the same variable setting.</para> + + <para>If the administrator wants to disable a + configuration file supplied by the vendor the + recommended way is to place a symlink to + <filename>/dev/null</filename> in + <filename>/etc/sysctl.d/</filename> bearing the + same file name.</para> + </refsect1> + + <refsect1> + <title>Example</title> + <example> + <title>/etc/sysctl.d/domain-name.conf example:</title> + + <programlisting># Set kernel YP domain name +kernel.domainname=example.com</programlisting> + </example> + </refsect1> + + <refsect1> + <title>See Also</title> + <para> + <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemd-sysctl.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemd-delta</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>sysctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>, + <citerefentry><refentrytitle>sysctl.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry> + </para> + </refsect1> + +</refentry> |