systemd-timedated.service, systemd-timedated - Time and date bus mechanism
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: • The system time • The system timezone • A boolean controlling whether the system RTC is in local or UTC timezone • 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.
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 /usr/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 # /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
systemd(1), timedatectl(1), localtime(5), hwclock(8), systemd-timesyncd(8)
This page is part of the systemd (systemd system and service manager) project. Information about the project can be found at ⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have a bug report for this manual page, see ⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩. This page was obtained from the project's upstream Git repository ⟨https://github.com/systemd/systemd.git⟩ on 2021-08-27. (At that time, the date of the most recent commit that was found in the repository was 2021-08-27.) If you discover any rendering problems in this HTML version of the page, or you believe there is a better or more up-to-date source for the page, or you have corrections or improvements to the information in this COLOPHON (which is not part of the original manual page), send a mail to email@example.com systemd 249 SYSTEMD-TIMEDATED.SERVICE(8)
Pages that refer to this page: timedatectl(1), localtime(5), org.freedesktop.timedate1(5)