Installing and Administering Internet Services

230 Chapter 7

Conﬁguring NTP

Troubleshooting ntp

If ntp is not operating properly, use this section to identify and correct

the problem.

To Find Out if xntpd is Running

Issue the following command to ﬁnd out if xntpd is running:

/usr/bin/ps -ef | /usr/bin/grep xntpd

This command reports the process identiﬁcation (PID), current time, and

the command invoked (xntpd). An example output is shown below:

daemon 4484 1 0 Feb 18 0:00 xntpd

user 3691 2396 2 15:08:45 0:00 grep xntp

Ensure syslogd is conﬁgured to log daemon information messages to

the ﬁle /var/adm/syslog/syslog.log. To check this conﬁguration,

make sure /etc/syslog.conf includes one of the following lines:

*.info /var/adm/syslog/syslog.log

daemon.info /var/adm/syslog/syslog.log

If xntpd is not running, check the syslog ﬁle for related messages.

NTP Associations

Each NTP daemon must form an association with a time source: a

higher-level (lower stratum) server or, for stratum-1 servers, an external

clock. NTP daemons may form additional associations with peer servers.

To list the NTP associations the local NTP daemon has established, use

the command:

/usr/sbin/ntpq -p

Note that in the output an asterisk (*) must appear next to the node

name to indicate that an association has been formed.

In the example below, the local NTP daemon has established an

association with the NTP daemon on node good.cup.hp, but not with

the node bad: