HP-UX Internet Services Administrator's Guide (May 2010)

options on the command line when you start xntpd. While xntpd is running, you can
also display xntpd variables and modify configuration options using the ntpq and
xntpdc utilities. For more information, type man 1M xntpd, man 1M ntpq or man
1M xntpdc at the HP-UX prompt.
The NTP Configuration File
The NTP configuration file, /etc/ntp.conf, contains the initial values for
synchronization sources, modes and other related information. The xntpd daemon
reads the /etc/ntp.conf file during startup to determine the initial configuration
values for the time server. The configuration file format is similar to a UNIX®
configuration file. You can insert comments with a pound symbol (#) in the beginning
of the line. A configuration command consists of an initial keyword followed by a list
of arguments. Arguments can be host names, host addresses, integers, floating point
numbers and text strings.
The configuration commands for a peer, server and broadcast are as follows:
peer address [ key key_id ] [version version _id ] [ prefer ]
server address [ key key_id ] [ version version_id ] [ prefer ] [ mode mode ]
broadcast address [ key key_id ] [ version version_id ] [ ttl ttl ]
You can use these commands to specify either the name or address of the time server,
and the mode in which the time server must operate. For more information, type man
1M xntpd at the HP-UX prompt.
Configuring Your Primary NTP Server
The following steps describe how to configure the primary NTP server:
1. Install the latest version of NTP on the system.
2. Select a source of time: radio receivers, public time server or local NTP system.
3. Add the server name to the file /etc/ntp.conf using the following command:
server my_server.mydomain.my_org.com
my_server.mydomain.my_org.comis the complete name of the server.
4. Specify the time source and add its information to the configuration file.
• For Radio Receivers:
56 Configuring NTP