# phpman > info > systemd-time-wait-sync.service

[SYSTEMD-TIME-WAIT-SYNC.Ssystemd-time-wait-synSYSTEMD-TIME-WAIT-SYNC.SERVICE(8)](https://www.chedong.com/phpMan.php/man/SYSTEMD-TIME-WAIT-SYNC.Ssystemd-time-wait-synSYSTEMD-TIME-WAIT-SYNC.SERVICE/8/markdown)

NAME
       systemd-time-wait-sync.service, systemd-time-wait-sync - Wait until
       kernel time is synchronized

SYNOPSIS
       systemd-time-wait-sync.service

       /lib/systemd/systemd-time-wait-sync

DESCRIPTION
       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)](https://www.chedong.com/phpMan.php/man/systemd.special/7/markdown)
       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).

FILES
       /run/systemd/timesync/synchronized
           The presence of this file indicates to this service that the system
           clock has been synchronized.

SEE ALSO
       [systemd(1)](https://www.chedong.com/phpMan.php/man/systemd/1/markdown), [systemd.special(7)](https://www.chedong.com/phpMan.php/man/systemd.special/7/markdown), [systemd-timesyncd.service(8)](https://www.chedong.com/phpMan.php/man/systemd-timesyncd.service/8/markdown),

systemd 249                                  [SYSTEMD-TIME-WAIT-SYNC.SERVICE(8)](https://www.chedong.com/phpMan.php/man/SYSTEMD-TIME-WAIT-SYNC.SERVICE/8/markdown)