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+<?xml version="1.0"?>
+<!--*-nxml-*-->
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+<!--
+  This file is part of systemd.
+
+  Copyright 2014 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+-->
+<refentry id="systemd-update-done.service">
+
+        <refentryinfo>
+                <title>systemd-update-done.service</title>
+                <productname>systemd</productname>
+
+                <authorgroup>
+                        <author>
+                                <contrib>Developer</contrib>
+                                <firstname>Lennart</firstname>
+                                <surname>Poettering</surname>
+                                <email>lennart@poettering.net</email>
+                        </author>
+                </authorgroup>
+        </refentryinfo>
+
+        <refmeta>
+                <refentrytitle>systemd-update-done.service</refentrytitle>
+                <manvolnum>8</manvolnum>
+        </refmeta>
+
+        <refnamediv>
+                <refname>systemd-update-done.service</refname>
+                <refname>systemd-update-done</refname>
+                <refpurpose>Mark <filename>/etc</filename> and <filename>/var</filename> fully updated</refpurpose>
+        </refnamediv>
+
+        <refsynopsisdiv>
+                <para><filename>systemd-update-done.service</filename></para>
+                <para><filename>/usr/lib/systemd/systemd-update-done</filename></para>
+        </refsynopsisdiv>
+
+        <refsect1>
+                <title>Description</title>
+
+                <para><filename>systemd-update-done.service</filename>
+                is a service that is invoked as part of the first boot
+                after the vendor operating system resources in
+                <filename>/usr</filename> have been updated. This is
+                useful to implement offline updates of
+                <filename>/usr</filename> which might requires updates
+                to <filename>/etc</filename> or
+                <filename>/var</filename> on the following boot.</para>
+
+                <para><filename>systemd-update-done.service</filename>
+                updates the file modification time (mtime) of the
+                stamp files <filename>/etc/.updated</filename> and
+                <filename>/var/.updated</filename> to the modification
+                time of the <filename>/usr</filename> directory,
+                unless the stamp files are already newer.</para>
+
+                <para>Services that shall run after offline upgrades
+                of <filename>/usr</filename> should order themselves
+                before
+                <filename>systemd-update-done.service</filename>, and
+                use the <varname>ConditionNeedsUpdate=</varname> (see
+                <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>)
+                condition to make sure to run when
+                <filename>/etc</filename> or <filename>/var</filename>
+                are older than <filename>/usr</filename> according to
+                the modification times of the files described
+                above. This requires that updates to
+                <filename>/usr</filename> are always followed by an
+                update of the modification time of
+                <filename>/usr</filename>, for example by invoking
+                <citerefentry><refentrytitle>touch</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+                on it.</para>
+
+        </refsect1>
+
+        <refsect1>
+                <title>See Also</title>
+                <para>
+                        <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+                        <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+                        <citerefentry><refentrytitle>touch</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+                </para>
+        </refsect1>
+
+</refentry>