table of contents
other versions
- jessie-backports 230-7~bpo8+2
- stretch 232-25+deb9u4
- testing 239-7
- stretch-backports 237-3~bpo9+1
- unstable 239-7
TIMESYNCD.CONF(5) | timesyncd.conf | TIMESYNCD.CONF(5) |
NAME¶
timesyncd.conf, timesyncd.conf.d - Network Time Synchronization configuration filesSYNOPSIS¶
/etc/systemd/timesyncd.conf /etc/systemd/timesyncd.conf.d/*.conf /run/systemd/timesyncd.conf.d/*.conf /usr/lib/systemd/timesyncd.conf.d/*.confDESCRIPTION¶
These configuration files control NTP network time synchronization.CONFIGURATION DIRECTORIES AND PRECEDENCE¶
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.OPTIONS¶
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.
SEE ALSO¶
systemd(1), systemd-timesyncd.service(8), systemd-networkd.service(8)systemd 230 |