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
are ordered after time-sync.target
(see
systemd.special(7) for
details) until the system time has been synchronized with an accurate remote reference time source by
systemd-timesyncd.service
.
systemd-timesyncd.service
notifies systemd-time-wait-sync
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).