diff options
Diffstat (limited to 'man/systemd-sysctl.service.xml')
| -rw-r--r-- | man/systemd-sysctl.service.xml | 69 |
1 files changed, 59 insertions, 10 deletions
diff --git a/man/systemd-sysctl.service.xml b/man/systemd-sysctl.service.xml index 9027ff0f3f..686b2cdef4 100644 --- a/man/systemd-sysctl.service.xml +++ b/man/systemd-sysctl.service.xml @@ -62,24 +62,29 @@ <para><filename>systemd-sysctl.service</filename> is an early boot service that configures <citerefentry project='man-pages'><refentrytitle>sysctl</refentrytitle><manvolnum>8</manvolnum></citerefentry> - kernel parameters.</para> + kernel parameters by invoking <command>/usr/lib/systemd/systemd-sysctl</command>.</para> - <para>If invoked with no arguments, it applies all directives from - all configuration files in - <citerefentry><refentrytitle>sysctl.d</refentrytitle><manvolnum>5</manvolnum></citerefentry> - are searched for a matching file. If one or more filenames are passed on - the command line, only the directives in these files are applied. - </para> + <para>When invoked with no arguments, <command>/usr/lib/systemd/systemd-sysctl</command> applies + all directives from configuration files listed in + <citerefentry><refentrytitle>sysctl.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>. + If one or more filenames are passed on the command line, only the directives in these files are + applied.</para> + + <para>In addition, <option>--prefix=</option> option may be used to limit which sysctl + settings are applied.</para> <para>See <citerefentry project='man-pages'><refentrytitle>sysctl.d</refentrytitle><manvolnum>5</manvolnum></citerefentry> - for information about the configuration of this service.</para> + for information about the configuration of sysctl settings. After sysctl configuration is + changed on disk, it must be written to the files in <filename>/proc/sys</filename> before it + takes effect. It is possible to update specific settings, or simply to reload all configuration, + see Examples below.</para> </refsect1> <refsect1><title>Options</title> <variablelist> - <varlistentry id='path'> - <term><option>--path=</option></term> + <varlistentry id='prefix'> + <term><option>--prefix=</option></term> <listitem> <para>Only apply rules with the specified prefix.</para> </listitem> @@ -92,6 +97,50 @@ </refsect1> <refsect1> + <title>Examples</title> + + <example> + <title>Reset all sysctl settings</title> + + <programlisting>systemctl restart systemd-sysctl</programlisting> + </example> + + <example> + <title>View coredump handler configuration</title> + + <programlisting># sysctl kernel.core_pattern +kernel.core_pattern = |/usr/libexec/abrt-hook-ccpp %s %c %p %u %g %t %P %I +</programlisting> + </example> + + <example> + <title>Update coredump handler configuration</title> + + <programlisting># /usr/lib/systemd/systemd-sysctl --prefix kernel.core_pattern</programlisting> + + <para>This searches all the directories listed in + <citerefentry><refentrytitle>sysctl.d</refentrytitle><manvolnum>5</manvolnum></citerefentry> + for configuration files and writes <filename>/proc/sys/kernel/core_pattern</filename>.</para> + </example> + + <example> + <title>Update coredump handler configuration according to a specific file</title> + + <programlisting># /usr/lib/systemd/systemd-sysctl 50-coredump.conf</programlisting> + + <para>This applies all the settings found in <filename>50-coredump.conf</filename>. + Either <filename>/etc/sysctl.d/50-coredump.conf</filename>, or + <filename>/run/sysctl.d/50-coredump.conf</filename>, or + <filename>/usr/lib/sysctl.d/50-coredump.conf</filename> will be used, in the order + of preference.</para> + </example> + + <para>See + <citerefentry project='man-pages'><refentrytitle>sysctl</refentrytitle><manvolnum>8</manvolnum></citerefentry> + for various ways to directly apply sysctl settings.</para> + </refsect1> + + <refsect1> <title>See Also</title> <para> <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, |