227 lines
4.2 KiB
HTML
227 lines
4.2 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML><HEAD><TITLE>Man page of SYSTEMD-SYSCTL.SERVICE</TITLE>
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</HEAD><BODY>
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<H1>SYSTEMD-SYSCTL.SERVICE</H1>
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Section: systemd-sysctl.service (8)<BR>Updated: <BR><A HREF="#index">Index</A>
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<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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systemd-sysctl.service, systemd-sysctl - Configure kernel parameters at boot
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<DL COMPACT>
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<DT id="1">
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<B>/lib/systemd/systemd-sysctl</B> [OPTIONS...] [<I>CONFIGFILE</I>...]
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</DL>
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<P>
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<DD>systemd-sysctl.service
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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<P>
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systemd-sysctl.service
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is an early boot service that configures
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<B><A HREF="/cgi-bin/man/man2html?8+sysctl">sysctl</A></B>(8)
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kernel parameters by invoking
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<B>/lib/systemd/systemd-sysctl</B>.
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<P>
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When invoked with no arguments,
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<B>/lib/systemd/systemd-sysctl</B>
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applies all directives from configuration files listed in
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<B><A HREF="/cgi-bin/man/man2html?5+sysctl.d">sysctl.d</A></B>(5). If one or more filenames are passed on the command line, only the directives in these files are applied.
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<P>
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In addition,
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<B>--prefix=</B>
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option may be used to limit which sysctl settings are applied.
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<P>
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See
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<B><A HREF="/cgi-bin/man/man2html?5+sysctl.d">sysctl.d</A></B>(5)
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for information about the configuration of sysctl settings. After sysctl configuration is changed on disk, it must be written to the files in
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/proc/sys
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before it takes effect. It is possible to update specific settings, or simply to reload all configuration, see Examples below.
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<A NAME="lbAE"> </A>
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<H2>OPTIONS</H2>
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<P>
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<B>--prefix=</B>
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<DL COMPACT><DT id="2"><DD>
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Only apply rules with the specified prefix.
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</DL>
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<P>
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<B>--cat-config</B>
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<DL COMPACT><DT id="3"><DD>
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Copy the contents of config files to standard output. Before each file, the filename is printed as a comment.
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</DL>
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<P>
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<B>--no-pager</B>
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<DL COMPACT><DT id="4"><DD>
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Do not pipe output into a pager.
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</DL>
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<P>
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<B>-h</B>, <B>--help</B>
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<DL COMPACT><DT id="5"><DD>
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Print a short help text and exit.
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</DL>
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<P>
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<B>--version</B>
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<DL COMPACT><DT id="6"><DD>
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Print a short version string and exit.
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</DL>
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<A NAME="lbAF"> </A>
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<H2>EXAMPLES</H2>
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<P>
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<B>Example 1. Reset all sysctl settings</B>
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<P>
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<DL COMPACT><DT id="7"><DD>
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<PRE>
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systemctl restart systemd-sysctl
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</PRE>
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</DL>
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<P>
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<B>Example 2. View coredump handler configuration</B>
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<P>
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<DL COMPACT><DT id="8"><DD>
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<PRE>
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# sysctl kernel.core_pattern
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kernel.core_pattern = |/libexec/abrt-hook-ccpp %s %c %p %u %g %t %P %I
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</PRE>
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</DL>
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<P>
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<B>Example 3. Update coredump handler configuration</B>
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<P>
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<DL COMPACT><DT id="9"><DD>
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<PRE>
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# /lib/systemd/systemd-sysctl --prefix kernel.core_pattern
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</PRE>
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</DL>
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<P>
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This searches all the directories listed in
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<B><A HREF="/cgi-bin/man/man2html?5+sysctl.d">sysctl.d</A></B>(5)
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for configuration files and writes
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/proc/sys/kernel/core_pattern.
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<P>
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<B>Example 4. Update coredump handler configuration according to a specific file</B>
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<P>
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<DL COMPACT><DT id="10"><DD>
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<PRE>
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# /lib/systemd/systemd-sysctl 50-coredump.conf
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</PRE>
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</DL>
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<P>
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This applies all the settings found in
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50-coredump.conf. Either
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/etc/sysctl.d/50-coredump.conf, or
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/run/sysctl.d/50-coredump.conf, or
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/usr/lib/sysctl.d/50-coredump.conf
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will be used, in the order of preference.
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<P>
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See
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<B><A HREF="/cgi-bin/man/man2html?8+sysctl">sysctl</A></B>(8)
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for various ways to directly apply sysctl settings.
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<A NAME="lbAG"> </A>
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<H2>SEE ALSO</H2>
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<P>
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<B><A HREF="/cgi-bin/man/man2html?1+systemd">systemd</A></B>(1),
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<B><A HREF="/cgi-bin/man/man2html?5+sysctl.d">sysctl.d</A></B>(5),
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<B><A HREF="/cgi-bin/man/man2html?8+sysctl">sysctl</A></B>(8),
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<P>
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<HR>
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<A NAME="index"> </A><H2>Index</H2>
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<DL>
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<DT id="11"><A HREF="#lbAB">NAME</A><DD>
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<DT id="12"><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT id="13"><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT id="14"><A HREF="#lbAE">OPTIONS</A><DD>
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<DT id="15"><A HREF="#lbAF">EXAMPLES</A><DD>
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<DT id="16"><A HREF="#lbAG">SEE ALSO</A><DD>
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</DL>
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<HR>
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This document was created by
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<A HREF="/cgi-bin/man/man2html">man2html</A>,
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using the manual pages.<BR>
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Time: 00:06:17 GMT, March 31, 2021
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</BODY>
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</HTML>
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