SYSTEMD-TIMEDATED.SERVICE(8)         SYSTEMD-TIMEDATED.SERVICE(8)

     NAME
          systemd-timedated.service, systemd-timedated - Time and date
          bus mechanism

     SYNOPSIS
          systemd-timedated.service

          /lib/systemd/systemd-timedated

     DESCRIPTION
          systemd-timedated.service is a system service that may be
          used as a mechanism to change the system clock and timezone,
          as well as to enable/disable network time synchronization.
          systemd-timedated is automatically activated on request and
          terminates itself when it is unused.

          The tool timedatectl(1) is a command line client to this
          service.

          systemd-timedated currently offers access to the following
          four settings:

          +o   The system time

          +o   The system timezone

          +o   A boolean controlling whether the system RTC is in local
              or UTC timezone

          +o   Whether the time synchronization service is
              enabled/started or disabled/stopped, see next section.

          See org.freedesktop.timedate1(5) and
          org.freedesktop.LogControl1(5) for information about the
          D-Bus API.

     LIST OF NETWORK TIME SYNCHRONIZATION SERVICES
          systemd-timesyncd will look for files with a ".list"
          extension in ntp-units.d/ directories. Each file is parsed
          as a list of unit names, one per line. Empty lines and lines
          with comments ("#") are ignored. Files are read from
          /usr/lib/systemd/ntp-units.d/ and the corresponding
          directories under /etc/, /run/, /usr/local/lib/. Files in
          /etc/ override files with the same name in /run/,
          /usr/local/lib/, and /lib/. Files in /run/ override files
          with the same name under /usr/. Packages should install
          their configuration files in /usr/lib/ (distribution
          packages) or /usr/local/lib/ (local installs).

          Example 1. ntp-units.d/ entry for systemd-timesyncd

     Page 1                     systemd 247          (printed 5/25/22)

     SYSTEMD-TIMEDATED.SERVICE(8)         SYSTEMD-TIMEDATED.SERVICE(8)

              # /usr/lib/systemd/ntp-units.d/80-systemd-timesync.list
              systemd-timesyncd.service

          If the environment variable $SYSTEMD_TIMEDATED_NTP_SERVICES
          is set, systemd-timesyncd will parse the contents of that
          variable as a colon-separated list of unit names. When set,
          this variable overrides the file-based list described above.

          Example 2. An override that specifies that chronyd should be
          used if available

              SYSTEMD_TIMEDATED_NTP_SERVICES=chronyd.service:systemd-timesyncd.service

     SEE ALSO
          systemd(1), timedatectl(1), localtime(5), hwclock(8),
          systemd-timesyncd(8)

     Page 2                     systemd 247          (printed 5/25/22)