+
+ <para>Volatile and temporary files and directories are
+ those located in <filename>/run</filename> (and its
+ alias <filename>/var/run</filename>),
+ <filename>/tmp</filename>,
+ <filename>/var/tmp</filename>, the API file systems
+ such as <filename>/sys</filename> or
+ <filename>/proc</filename>, as well as some other
+ directories below <filename>/var</filename>.</para>
+
+ <para>System daemons frequently require private
+ runtime directories below <filename>/run</filename> to
+ place communication sockets and similar in. For these
+ consider declaring them in their unit files using
+ <varname>RuntimeDirectory=</varname>
+ (see <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry> for details),
+ if this is feasible.</para>