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NAME | SYNOPSIS | DESCRIPTION | LIST OF NETWORK TIME SYNCHRONIZATION SERVICES | SEE ALSO | COLOPHON |
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SYSTEMD-T....SERVICE(8) systemd-timedated.serviceSYSTEMD-T....SERVICE(8)
systemd-timedated.service, systemd-timedated - Time and date bus
mechanism
systemd-timedated.service
/usr/lib/systemd/systemd-timedated
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-timedated 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-timedated 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 2024-06-14. (At that
time, the date of the most recent commit that was found in the
repository was 2024-06-13.) 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 protected]
systemd 257~devel SYSTEMD-T....SERVICE(8)
Pages that refer to this page: timedatectl(1), localtime(5), org.freedesktop.timedate1(5), systemd.directives(7), systemd.index(7)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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