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Diffstat (limited to 'man/sysctl.d.xml')
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diff --git a/man/sysctl.d.xml b/man/sysctl.d.xml deleted file mode 100644 index ccf6c8e39f..0000000000 --- a/man/sysctl.d.xml +++ /dev/null @@ -1,184 +0,0 @@ -<?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" - xmlns:xi="http://www.w3.org/2001/XInclude"> - - <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 project='man-pages'><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 <literal>#</literal> or - <literal>;</literal> are ignored.</para> - - <para>Note that either <literal>/</literal> or - <literal>.</literal> may be used as separators within sysctl - variable names. If the first separator is a slash, remaining - slashes and dots are left intact. If the first separator is a dot, - dots and slashes are interchanged. - <literal>kernel.domainname=foo</literal> and - <literal>kernel/domainname=foo</literal> are equivalent and will - cause <literal>foo</literal> to be written to - <filename>/proc/sys/kernel/domainname</filename>. Either - <literal>net.ipv4.conf.enp3s0/200.forwarding</literal> or - <literal>net/ipv4/conf/enp3s0.200/forwarding</literal> may be used - to refer to - <filename>/proc/sys/net/ipv4/conf/enp3s0.200/forwarding</filename>. - </para> - - <para>The settings configured with <filename>sysctl.d</filename> - files will be applied early on boot. The network - interface-specific options will also be applied individually for - each network interface as it shows up in the system. (More - specifically, <filename>net.ipv4.conf.*</filename>, - <filename>net.ipv6.conf.*</filename>, - <filename>net.ipv4.neigh.*</filename> and - <filename>net.ipv6.neigh.*</filename>).</para> - - <para>Many sysctl parameters only become available when certain - kernel modules are loaded. Modules are usually loaded on demand, - e.g. when certain hardware is plugged in or network brought up. - This means that - <citerefentry><refentrytitle>systemd-sysctl.service</refentrytitle><manvolnum>8</manvolnum></citerefentry> - which runs during early boot will not configure such parameters if - they become available after it has run. To set such parameters, it - is recommended to add an - <citerefentry><refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum></citerefentry> - rule to set those parameters when they become available. - Alternatively, a slightly simpler and less efficient option is to - add the module to - <citerefentry><refentrytitle>modules-load.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>, - causing it to be loaded statically before sysctl settings are - applied (see example below).</para> - </refsect1> - - <xi:include href="standard-conf.xml" xpointer="confd" /> - - <refsect1> - <title>Examples</title> - <example> - <title>Set kernel YP domain name</title> - <para><filename>/etc/sysctl.d/domain-name.conf</filename>: - </para> - - <programlisting>kernel.domainname=example.com</programlisting> - </example> - - <example> - <title>Apply settings available only when a certain module is loaded (method one)</title> - <para><filename>/etc/udev/rules.d/99-bridge.rules</filename>: - </para> - - <programlisting>ACTION=="add", SUBSYSTEM=="module", KERNEL=="br_netfilter", \ - RUN+="/usr/lib/systemd/systemd-sysctl --prefix=/net/bridge" -</programlisting> - - <para><filename>/etc/sysctl.d/bridge.conf</filename>: - </para> - - <programlisting>net.bridge.bridge-nf-call-ip6tables = 0 -net.bridge.bridge-nf-call-iptables = 0 -net.bridge.bridge-nf-call-arptables = 0 -</programlisting> - - <para>This method applies settings when the module is - loaded. Please note that, unless the <filename>br_netfilter</filename> - module is loaded, bridged packets will not be filtered by - Netfilter (starting with kernel 3.18), so simply not loading the - module is sufficient to avoid filtering.</para> - </example> - - <example> - <title>Apply settings available only when a certain module is loaded (method two)</title> - <para><filename>/etc/modules-load.d/bridge.conf</filename>: - </para> - - <programlisting>br_netfilter</programlisting> - - <para><filename>/etc/sysctl.d/bridge.conf</filename>: - </para> - - <programlisting>net.bridge.bridge-nf-call-ip6tables = 0 -net.bridge.bridge-nf-call-iptables = 0 -net.bridge.bridge-nf-call-arptables = 0 -</programlisting> - - <para>This method forces the module to be always loaded. Please - note that, unless the <filename>br_netfilter</filename> module is - loaded, bridged packets will not be filtered with Netfilter - (starting with kernel 3.18), so simply not loading the module is - sufficient to avoid filtering.</para> - </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 project='man-pages'><refentrytitle>sysctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>, - <citerefentry project='man-pages'><refentrytitle>sysctl.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>, - <citerefentry project='man-pages'><refentrytitle>modprobe</refentrytitle><manvolnum>8</manvolnum></citerefentry> - </para> - </refsect1> - -</refentry> |