HP-UX Internet Services Administrator's Guide (August 2003)

Configuring NTP
Getting Started with NTP
Chapter 474
This starts the daemon automatically when the system
transitions from level 1 to 2.
c. Start the daemon using the startup script:
/sbin/init.d/xntpd start
d. Verify whether the daemon process is running using the
following command:
ps -ef | grep ntp
The line /usr/sbin/xntpd appears in the list of running
processes.