timesyncd.conf.d <root
TIMESYNCD.CONF(5)                         timesyncd.conf                        TIMESYNCD.CONF(5)

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

SYNOPSIS
       /etc/systemd/timesyncd.conf

       /etc/systemd/timesyncd.conf.d/*.conf

       /run/systemd/timesyncd.conf.d/*.conf

       /usr/lib/systemd/timesyncd.conf.d/*.conf

DESCRIPTION
       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 229                                                                     TIMESYNCD.CONF(5)

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