TIMESYNCD.CONF(5)              timesyncd.conf              TIMESYNCD.CONF(5)

NAME         top

       timesyncd.conf, timesyncd.conf.d - Network Time Synchronization
       configuration files

SYNOPSIS         top





DESCRIPTION         top

       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

       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         top

       The following settings are configured in the "[Time]" section:

           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.

           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         top

       systemd(1), systemd-timesyncd.service(8), systemd-networkd.service(8)

COLOPHON         top

       This page is part of the systemd (systemd system and service manager)
       project.  Information about the project can be found at 
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       report for this manual page, see 
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systemd 233                                                TIMESYNCD.CONF(5)