1 files changed, 107 insertions, 0 deletions
diff --git a/man/systemd-timesyncd.service.xml b/man/systemd-timesyncd.service.xml
new file mode 100644
index 0000000..cdea106
--- /dev/null
+++ b/man/systemd-timesyncd.service.xml
@@ -0,0 +1,107 @@
+<?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">
+
+<!--
+  SPDX-License-Identifier: LGPL-2.1+
+-->
+
+<refentry id="systemd-timesyncd.service" conditional='ENABLE_TIMESYNCD'>
+
+  <refentryinfo>
+    <title>systemd-timesyncd.service</title>
+    <productname>systemd</productname>
+  </refentryinfo>
+
+  <refmeta>
+    <refentrytitle>systemd-timesyncd.service</refentrytitle>
+    <manvolnum>8</manvolnum>
+  </refmeta>
+
+  <refnamediv>
+    <refname>systemd-timesyncd.service</refname>
+    <refname>systemd-timesyncd</refname>
+    <refpurpose>Network Time Synchronization</refpurpose>
+  </refnamediv>
+
+  <refsynopsisdiv>
+    <para><filename>systemd-timesyncd.service</filename></para>
+    <para><filename>/usr/lib/systemd/systemd-timesyncd</filename></para>
+  </refsynopsisdiv>
+
+  <refsect1>
+    <title>Description</title>
+
+    <para><filename>systemd-timesyncd</filename> is a system service
+    that may be used to synchronize the local system clock with a
+    remote Network Time Protocol server. It also saves the local time
+    to disk every time the clock has been synchronized and uses this
+    to possibly advance the system realtime clock on subsequent
+    reboots to ensure it monotonically advances even if the system
+    lacks a battery-buffered RTC chip.</para>
+
+    <para>The <filename>systemd-timesyncd</filename> service
+    specifically implements only SNTP. This minimalistic
+    service will set the system clock for large offsets or
+    slowly adjust it for smaller deltas. More complex use
+    cases are not covered by <filename>systemd-timesyncd</filename>.</para>
+
+    <para>The NTP servers contacted are determined from the global
+    settings in
+    <citerefentry><refentrytitle>timesyncd.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+    the per-link static settings in <filename>.network</filename>
+    files, and the per-link dynamic settings received over DHCP. See
+    <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+    for more details.</para>
+
+    <para><citerefentry><refentrytitle>timedatectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>'s
+    <command>set-ntp</command> command may be used to enable and
+    start, or disable and stop this service.</para>
+
+    <para><citerefentry><refentrytitle>timedatectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>'s
+    <command>timesync-status</command> or <command>show-timesync</command> command can be used to show the
+    current status of this service.</para>
+  </refsect1>
+
+  <refsect1>
+    <title>Files</title>
+
+    <variablelist>
+      <varlistentry>
+        <term><filename>/var/lib/systemd/timesync/clock</filename></term>
+
+        <listitem>
+          <para>The modification time of this file indicates the timestamp of the last successful
+          synchronization (or at least the systemd build date, in case synchronization was not
+          possible).</para>
+        </listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><filename>/run/systemd/timesync/synchronized</filename></term>
+
+        <listitem>
+          <para>A file that is touched on each successful synchronization, to assist
+          <filename>systemd-time-wait-sync</filename> and other applications to detecting synchronization
+          events.</para>
+        </listitem>
+
+      </varlistentry>
+    </variablelist>
+  </refsect1>
+
+  <refsect1>
+    <title>See Also</title>
+    <para>
+      <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>timesyncd.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>systemd-time-wait-sync.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>timedatectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>localtime</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+      <citerefentry project='man-pages'><refentrytitle>hwclock</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+    </para>
+  </refsect1>
+
+</refentry>