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



          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 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.

              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).

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

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

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