man: systemd.offline-updates: Document system-update-pre.target usage

2018-06-21 10:45:55 +02:00
parent 3502baf8e2
commit bc3c5e1619
1 changed files with 11 additions and 0 deletions
@@ -139,6 +139,17 @@
        <varname>After=system-update-pre.target</varname>
        and explicitly pull in any other services it requires.</para>
      </listitem>
+
+      <listitem>
+        <para>It may be desirable to always run an auxiliary unit when booting
+        into offline-updates mode, which itself does not install updates. To
+        do this create a .service file with
+        <varname>Wants=system-update-pre.target</varname> and
+        <varname>Before=system-update-pre.target</varname> and add a symlink
+        to that file under
+        <filename noindex='true'>/usr/lib/systemd/system-update.target.wants</filename>
+        .</para>
+      </listitem>
    </orderedlist>
  </refsect1>