chiark / gitweb /
man: systemd.service(5): clarify behavior of SuccessExitStatus
[elogind.git] / man / sysctl.d.xml
index 4f30276ad4e9aba8901f96fdc076abc1d6f84d4b..5544283d49a229e5245ea04f17972e958b5be0d3 100644 (file)
         <refsect1>
                 <title>Description</title>
 
-               <para><command>systemd</command> uses configuration
-               files from the above directories to configure
-               <citerefentry><refentrytitle>sysctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>
-               kernel parameters during boot.</para>
+                <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>
+                <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>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
                 entirely equivalent.</para>
 
                 <para>Each configuration file shall be named in the
-                style of <filename>&lt;program&gt;.conf</filename>.
-                Files in <filename>/run/</filename> override files
-                with the same name in <filename>/usr/lib/</filename>.
-                Files in <filename>/etc</filename> override files with
-                the same name in <filename>/run/</filename> and
-                <filename>/usr/lib/</filename>. Packages should
-                install their configuration files in
+                style of <filename><replaceable>program</replaceable>.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 installed by vendor packages. All
-                configuration files are sorted by their name 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>
+                configuration files installed by vendor packages. All
+                configuration files are sorted by their filename in
+                lexicographic order, regardless of which of the
+                directories they reside in. If multiple files specify the
+                same variable name, the entry in the file with the
+                lexicographically latest name will be applied. It is
+                recommended to prefix all filenames with a two-digit
+                number and a dash, to simplify the ordering of the
+                files.</para>
 
                 <para>If the administrator wants to disable a
-                configuration file supplied by the vendor the
+                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> carrying with the
-                same name.</para>
+                <filename>/etc/sysctl.d/</filename> bearing the
+                same filename.</para>
         </refsect1>
 
         <refsect1>
@@ -115,6 +119,8 @@ kernel.domainname=example.com</programlisting>
                 <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>