HP-UX UNIX Configure an NTP Server

Q. How do I configure an NTP (network time protocol) Server under HP-UX UNIX server as my applications rely on the system clock accuracy to get current time / run reports?

A. NTP is used for time synchronization. Many applications such as backup shell/perl scripts, make utility and others depends upon accurate system time.

HP-UX xntpd server configuration

xntpd server (daemon) is used by HP-UX. Open file /etc/rc.config.d/netdaemons:
# vi /etc/rc.config.d/netdaemons
Make sure following variables are defined and XNTPD is set to 1:
export NTPDATE_SERVER='ntp.mycorp.com pool.ntp.org in.pool.ntp.org'
export XNTPD=1
export XNTPD_ARGS=

Save and close the file. Where,

  • NTPDATE_SERVER : space-separated list of timeserver / IPs – If server uses the radio clock / system time, leave the NTPDATE_SERVER blank.
  • XNTPD : set it to 1 to enable NTP
  • XNTPD_ARGS : set options, see man page

Make sure correct timezone is setup in /etc/TIMEZONE file (look for TZ variable):
# vi /etc/TIMEZONE
Save and close the file. Open /etc/ntp.conf file:
vi /etc/ntp.conf
Make sure server are defined:
server unix-box-ntp
server delhi-ntp
peer delhi-noc-ntp
driftfile /etc/ntp.drift

Close and save the file. Where,

  • server : ntp server used (poll) to obtain time
  • peer : a peer relationship with another ntp server
  • driftfile : track local clock time (drift of the local clock)

Start HP-UX ntp service:
# /sbin/init.d/xntpd start
# /sbin/init.d/xntpd stop <-- stop ntp service

Verify that everything is working fine:
# ntpq -p
Watch out log file /var/adm/syslog/syslog.log for errors:
# tail -f /var/adm/syslog/syslog.log
Make sure xntpd is running:
# ps -ef | grep xntpd

SAM – GUI Admin Tool

=> SAM can also be used to configure NTP service under HP-UX, just start SAM and open time window.

Posted by: SXI ADMIN

The author is the creator of SXI LLC and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting. Get the latest tutorials on SysAdmin, Linux/Unix and open source topics via RSS/XML feed or weekly email newsletter.