systemd-time-wait-sync.service, systemd-time-wait-sync — Wait until kernel time is synchronized
systemd-time-wait-sync.service
/usr/lib/systemd/systemd-time-wait-sync
systemd-time-wait-sync is a system service that delays the start of units that depend on
time-sync.target until the system time has been synchronized with an accurate time source by
systemd-timesyncd.service.
systemd-timesyncd.service notifies on successful synchronization.
systemd-time-wait-sync also tries to detect when the kernel marks the time as synchronized,
but this detection is not reliable and is intended only as a fallback for other services that can be used to
synchronize time (e.g., ntpd, chronyd).