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NAME | SYNOPSIS | DESCRIPTION | CONFIGURATION DIRECTORIES AND PRECEDENCE | OPTIONS | SEE ALSO | COLOPHON |
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TIMESYNCD.CONF(5) timesyncd.conf TIMESYNCD.CONF(5)
timesyncd.conf, timesyncd.conf.d - Network Time Synchronization
configuration files
/etc/systemd/timesyncd.conf
/etc/systemd/timesyncd.conf.d/*.conf
/run/systemd/timesyncd.conf.d/*.conf
/usr/lib/systemd/timesyncd.conf.d/*.conf
These configuration files control NTP network time synchronization.
The default configuration is defined during compilation, so a
configuration file is only needed when it is necessary to deviate
from those defaults. By default, the configuration file in
/etc/systemd/ contains commented out entries showing the defaults as
a guide to the administrator. This file can be edited to create local
overrides.
When packages need to customize the configuration, they can install
configuration snippets in /usr/lib/systemd/*.conf.d/. Files in /etc/
are reserved for the local administrator, who may use this logic to
override the configuration files installed by vendor packages. The
main configuration file is read before any of the configuration
directories, and has the lowest precedence; entries in a file in any
configuration directory override entries in the single configuration
file. Files in the *.conf.d/ configuration subdirectories are sorted
by their filename in lexicographic order, regardless of which of the
subdirectories they reside in. If multiple files specify the same
option, the entry in the file with the lexicographically latest name
takes precedence. It is recommended to prefix all filenames in those
subdirectories with a two-digit number and a dash, to simplify the
ordering of the files.
To disable a configuration file supplied by the vendor, the
recommended way is to place a symlink to /dev/null in the
configuration directory in /etc/, with the same filename as the
vendor configuration file.
The following settings are configured in the "[Time]" section:
NTP=
A space-separated list of NTP server host names or IP addresses.
During runtime this list is combined with any per-interface NTP
servers acquired from systemd-networkd.service(8).
systemd-timesyncd will contact all configured system or
per-interface servers in turn until one is found that responds.
This setting defaults to an empty list.
FallbackNTP=
A space-separated list of NTP server host names or IP addresses
to be used as the fallback NTP servers. Any per-interface NTP
servers obtained from systemd-networkd.service(8) take precedence
over this setting, as do any servers set via NTP= above. This
setting is hence only used if no other NTP server information is
known. If this option is not given, a compiled-in list of NTP
servers is used instead.
systemd(1), systemd-timesyncd.service(8), systemd-networkd.service(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 2018-02-02. (At that
time, the date of the most recent commit that was found in the repos‐
itory was 2018-02-02.) 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 man-pages@man7.org
systemd 234 TIMESYNCD.CONF(5)
Pages that refer to this page: systemd.directives(7), systemd.index(7), systemd-timesyncd.service(8)
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