systemd-time-wait-sync.service, systemd-time-wait-sync — Wait Until Kernel Time 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 servies that can be used to
synchronize time (e.g., ntpd, chronyd).