The default name for the configuration file of the NTP daemon ntpd is /etc/ntp.conf. The format of the configuration file for ntpd is similar to that of other POSIX configuration files. Comments are introduced with the # character and continue to the end of the line. Blank lines are ignored.
Configuration statements consist of a keyword, followed by a list of arguments which are separated by spaces. No distinction is made between uppercase and lowercase letters for the keywords of the commands. A statement may not extend over multiple lines. The most important configuration statements are described below.
A complete description is available, for example, in the HTML files under /opt/TCP-IP-SV/ntp/readme/TCP-IP-SV.ntp/html.
When ntpd is used as a broadcast client, no configuration statements are required.