systemd-time-wait-sync.service, systemd-time-wait-sync — Wait until kernel time is synchronized
systemd-time-wait-sync is a system service that delays the start of units that
are ordered after
details) until the system time has been synchronized with an accurate remote reference time source by
about successful synchronization.
systemd-time-wait-sync also tries to detect when
the kernel marks the system clock as synchronized, but this detection is not reliable and is intended
only as a fallback for compatibility with alternative NTP services that can be used to synchronize time
(e.g., ntpd, chronyd).
The presence of this file indicates to this service that the system clock has been synchronized.