NAME

       systemd-timesyncd.service, systemd-timesyncd - Network Time Synchronization

SYNOPSIS

       systemd-timesyncd.service

       /lib/systemd/systemd-timesyncd

DESCRIPTION

       systemd-timesyncd is a system service that may be used to synchronize the local system
       clock with a remote Network Time Protocol server. It also saves the local time to disk
       every time the clock has been synchronized and uses this to possibly advance the system
       realtime clock on subsequent reboots to ensure it monotonically advances even if the
       system lacks a battery-buffered RTC chip.

       The systemd-timesyncd service specifically implements only SNTP. This minimalistic service
       will set the system clock for large offsets or slowly adjust it for smaller deltas. More
       complex use cases are not covered by systemd-timesyncd.

       The NTP servers contacted are determined from the global settings in timesyncd.conf(5),
       the per-link static settings in .network files, and the per-link dynamic settings received
       over DHCP. See systemd.network(5) for more details.

       timedatectl(1)'s set-ntp command may be used to enable and start, or disable and stop this
       service.

       timedatectl(1)'s timesync-status or show-timesync command can be used to show the current
       status of this service.

FILES

       /var/lib/systemd/timesync/clock
           The modification time of this file indicates the timestamp of the last successful
           synchronization (or at least the systemd build date, in case synchronization was not
           possible).

       /run/systemd/timesync/synchronized
           A file that is touched on each successful synchronization, to assist
           systemd-time-wait-sync and other applications to detecting synchronization events.

SEE ALSO

       systemd(1), timesyncd.conf(5), systemd.network(5), systemd-networkd.service(8), systemd-
       time-wait-sync.service(8), timedatectl(1), localtime(5), hwclock(8)