1 <?xml version='
1.0'
?> <!--*-nxml-*-->
2 <!DOCTYPE refentry PUBLIC
"-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
4 <!-- SPDX-License-Identifier: LGPL-2.1+ -->
6 <refentry id=
"systemd-time-wait-sync.service" conditional='ENABLE_TIMESYNCD'
>
9 <title>systemd-time-wait-sync.service
</title>
10 <productname>systemd
</productname>
14 <refentrytitle>systemd-time-wait-sync.service
</refentrytitle>
15 <manvolnum>8</manvolnum>
19 <refname>systemd-time-wait-sync.service
</refname>
20 <refname>systemd-time-wait-sync
</refname>
21 <refpurpose>Wait until kernel time is synchronized
</refpurpose>
25 <para><filename>systemd-time-wait-sync.service
</filename></para>
26 <para><filename>/usr/lib/systemd/systemd-time-wait-sync
</filename></para>
30 <title>Description
</title>
32 <para><filename>systemd-time-wait-sync
</filename> is a system service that delays the start of units that depend on
33 <filename>time-sync.target
</filename> until the system time has been synchronized with an accurate time source by
34 <filename>systemd-timesyncd.service
</filename>.
</para>
36 <para><filename>systemd-timesyncd.service
</filename> notifies on successful synchronization.
37 <filename>systemd-time-wait-sync
</filename> also tries to detect when the kernel marks the time as synchronized,
38 but this detection is not reliable and is intended only as a fallback for other services that can be used to
39 synchronize time (e.g., ntpd, chronyd).
</para>
48 <term><filename>/run/systemd/timesync/synchronized
</filename></term>
51 <para>The presence of this file indicates to this service that the system clock has been synchronized.
</para>
60 <title>See Also
</title>
62 <citerefentry><refentrytitle>systemd
</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
63 <citerefentry><refentrytitle>systemd.special
</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
64 <citerefentry><refentrytitle>systemd-timesyncd.service
</refentrytitle><manvolnum>8</manvolnum></citerefentry>,