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-rw-r--r--man/standard-conf.xml42
1 files changed, 34 insertions, 8 deletions
diff --git a/man/standard-conf.xml b/man/standard-conf.xml
index b87d7e955b..36af45927d 100644
--- a/man/standard-conf.xml
+++ b/man/standard-conf.xml
@@ -33,13 +33,39 @@
configuration file.</para>
</refsection>
- <refsection id='conf'>
- <title>Configuration File</title>
-
- <para>Configuration is also read from a single configuration file in
- <filename>/etc/</filename>. This file is read before any of the
- configuration directories, and has the lowest precedence; entries in a file
- in any configuration directory override entries in the single configuration
- file.</para>
+ <refsection id='main-conf'>
+ <title>Configuration Directories and Precedence</title>
+
+ <para>Default configuration is defined during compilation, so a
+ configuration file is only needed when it is necessary to deviate
+ from those defaults. By default the configuration file in
+ <filename>/etc/systemd/</filename> contains commented out entries
+ showing the defaults as a guide to the administrator. This file
+ can be edited to create local overrides.
+ </para>
+
+ <para>When packages need to customize the configuration, they can
+ install configuration snippets in
+ <filename>/usr/lib/systemd/*.conf.d/</filename>. Files in
+ <filename>/etc/</filename> are reserved for the local
+ administrator, who may use this logic to override the
+ configuration files installed by vendor packages. The main
+ configuration file is read before any of the configuration
+ directories, and has the lowest precedence; entries in a file in
+ any configuration directory override entries in the single
+ configuration file. Files in the
+ <filename>logind.conf.d/</filename> configuration subdirectories
+ are sorted by their filename in lexicographic order, regardless of
+ which of the subdirectories they reside in. If multiple files
+ specify the same option, the entry in the file with the
+ lexicographically latest name takes precedence. It is recommended
+ to prefix all filenames in those subdirectories with a two-digit
+ number and a dash, to simplify the ordering of the files.</para>
+
+ <para>To disable a configuration file supplied by the vendor, the
+ recommended way is to place a symlink to
+ <filename>/dev/null</filename> in the configuration directory in
+ <filename>/etc/</filename>, with the same filename as the vendor
+ configuration file.</para>
</refsection>
</refsection>