Slam time, start the NTP daemon and verify time.
– Stop the daemon by typing: /etc/init.d/xntpd stop
– Slam the current time by typing: ntpdate x.x.x.x  (where x.x.x.x is the NTP source’s ip address)
(Force this command several times until the offset displayed is less than one second.)
– Start the daemon by typing: /etc/init.d/xntpd start 
– Wait for this server to show a reach of 377 by typing: ntpq -p    This may take 15-20 minutes.