REQUIREMENTS
PRE-INSTALL
POST-INSTALL
Create the necessary user 'ntp' and its group 'ntp'.
groupadd ntp
useradd -g ntp -d /var/empty -s /bin/false ntp
passwd -l ntp
MISCELLANEOUS
Have a look at the start/stop script if you don't like ntpd setting
the time immediately at startup. That allows for a large time
correction. Disable that feature by removing the '-s' option.