<para>The age field only applies to lines starting with
d, D and x. If omitted or set to - no automatic clean-up
is done.</para>
+
+ <para>If the age field starts with a tilde
+ character (~) the clean-up is only applied to
+ files and directories one level inside the
+ directory specified, but not the files and
+ directories immediately inside it.</para>
</refsect2>
<refsect2>