Lennart Poettering
0c69794138
These lines are generally out-of-date, incomplete and unnecessary. With SPDX and git repository much more accurate and fine grained information about licensing and authorship is available, hence let's drop the per-file copyright notice. Of course, removing copyright lines of others is problematic, hence this commit only removes my own lines and leaves all others untouched. It might be nicer if sooner or later those could go away too, making git the only and accurate source of authorship information.
140 lines
5.0 KiB
XML
140 lines
5.0 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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SPDX-License-Identifier: LGPL-2.1+
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-->
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<refentry id="systemd-sysctl.service"
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xmlns:xi="http://www.w3.org/2001/XInclude">
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<refentryinfo>
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<title>systemd-sysctl.service</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>systemd-sysctl.service</refentrytitle>
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<manvolnum>8</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>systemd-sysctl.service</refname>
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<refname>systemd-sysctl</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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<cmdsynopsis>
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<command>/usr/lib/systemd/systemd-sysctl</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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<arg choice="opt" rep="repeat"><replaceable>CONFIGFILE</replaceable></arg>
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</cmdsynopsis>
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<para><filename>systemd-sysctl.service</filename></para>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para><filename>systemd-sysctl.service</filename> is an early boot
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service that configures
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<citerefentry project='man-pages'><refentrytitle>sysctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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kernel parameters by invoking <command>/usr/lib/systemd/systemd-sysctl</command>.</para>
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<para>When invoked with no arguments, <command>/usr/lib/systemd/systemd-sysctl</command> applies
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all directives from configuration files listed in
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<citerefentry><refentrytitle>sysctl.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
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If one or more filenames are passed on the command line, only the directives in these files are
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applied.</para>
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<para>In addition, <option>--prefix=</option> option may be used to limit which sysctl
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settings are applied.</para>
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<para>See
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<citerefentry><refentrytitle>sysctl.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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for information about the configuration of sysctl settings. After sysctl configuration is
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changed on disk, it must be written to the files in <filename>/proc/sys</filename> before it
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takes effect. It is possible to update specific settings, or simply to reload all configuration,
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see Examples below.</para>
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</refsect1>
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<refsect1><title>Options</title>
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<variablelist>
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<varlistentry id='prefix'>
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<term><option>--prefix=</option></term>
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<listitem>
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<para>Only apply rules with the specified prefix.</para>
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</listitem>
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</varlistentry>
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<xi:include href="standard-options.xml" xpointer="cat-config" />
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<xi:include href="standard-options.xml" xpointer="no-pager" />
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<xi:include href="standard-options.xml" xpointer="help" />
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<xi:include href="standard-options.xml" xpointer="version" />
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</variablelist>
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</refsect1>
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<refsect1>
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<title>Examples</title>
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<example>
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<title>Reset all sysctl settings</title>
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<programlisting>systemctl restart systemd-sysctl</programlisting>
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</example>
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<example>
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<title>View coredump handler configuration</title>
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<programlisting># sysctl kernel.core_pattern
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kernel.core_pattern = |/usr/libexec/abrt-hook-ccpp %s %c %p %u %g %t %P %I
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</programlisting>
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</example>
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<example>
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<title>Update coredump handler configuration</title>
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<programlisting># /usr/lib/systemd/systemd-sysctl --prefix kernel.core_pattern</programlisting>
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<para>This searches all the directories listed in
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<citerefentry><refentrytitle>sysctl.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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for configuration files and writes <filename>/proc/sys/kernel/core_pattern</filename>.</para>
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</example>
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<example>
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<title>Update coredump handler configuration according to a specific file</title>
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<programlisting># /usr/lib/systemd/systemd-sysctl 50-coredump.conf</programlisting>
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<para>This applies all the settings found in <filename>50-coredump.conf</filename>.
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Either <filename>/etc/sysctl.d/50-coredump.conf</filename>, or
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<filename>/run/sysctl.d/50-coredump.conf</filename>, or
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<filename>/usr/lib/sysctl.d/50-coredump.conf</filename> will be used, in the order
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of preference.</para>
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</example>
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<para>See
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<citerefentry project='man-pages'><refentrytitle>sysctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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for various ways to directly apply sysctl settings.</para>
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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.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry project='man-pages'><refentrytitle>sysctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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</para>
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</refsect1>
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</refentry>
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