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-rw-r--r--man/systemd.unit.xml12
1 files changed, 12 insertions, 0 deletions
diff --git a/man/systemd.unit.xml b/man/systemd.unit.xml
index 9846659134..a95c160954 100644
--- a/man/systemd.unit.xml
+++ b/man/systemd.unit.xml
@@ -191,6 +191,17 @@
<literal>.d/</literal> subdirectory and reads its
<literal>.conf</literal> files.</para>
+ <para>In addition to <filename>/etc/systemd/system</filename>,
+ the drop-in <literal>.conf</literal> files for system services
+ can be placed in <filename>/usr/lib/systemd/system</filename> or
+ <filename>/run/systemd/system</filename> directories. Drop-in
+ files in <filename>/etc</filename> take precedence over those in
+ <filename>/run</filename> which in turn take precedence over
+ those in <filename>/usr/lib</filename>. Drop-in files under any of
+ these directories take precedence over unit files wherever located.
+ (Of course, since <filename>/run</filename> is temporary and
+ <filename>/usr/lib</filename> is for vendors, it is unlikely
+ drop-ins should be used in either of those places.)</para>
<!-- Note that we do not document .include here, as we
consider it mostly obsolete, and want people to
use .d/ drop-ins instead. -->
@@ -1402,6 +1413,7 @@ PrivateTmp=yes</programlisting>
cannot be reset to an empty list, so dependencies can only be
added in drop-ins. If you want to remove dependencies, you have
to override the entire unit.</para>
+
</example>
</refsect1>