Most of modern Unix systems have NTP included in distribution. Please note, that xntpd is NTP version 3 daemon. Therefore the NTP daemon can be compiled on the target system at any time. There is NTP distribution included on cd:\drivers\ntp\unix. First unpack gzipped tar archive:

Then run configuration script from main NTP distribution directory:

All necessary information from the system will be collected and the corresponding make files will be generated in the subdirectories. After that the NTP daemon and all needed utilities will be generated. Please type:

While compiling the several warnings may appear. This warnings are mostly unimportant. In case of problems during the compilation read the system dependent notes in the './html' subdirectory. Afterwards the generated programs and tools have to be moved in the corresponding directories in /usr/local tree. Please type:

The time adjustment can occur in different ways. Either the system time can be set once by using the tool ntpdate or the NTP daemon is started. In the first case it is recommended to set the time automatically from crontab or once when booting the system. The second case is described below.

First a file named /etc/ntp.conf has to be generated with an editor.

The NTP daemon is started with ntpd or, using rc.local, while booting the system. If you want to start NTP without downtime, consider using “-g -x” options, to force slewing time and ignore sanity 1000s offset check.

Status messages during operation are saved in /var/log/ directory (corresponding to the syslog configuration):

e.g.: # tail -f /var/log/messages

It shows the last lines from the file messages. The status messages can also be redirected in a log file by using the following option: