I am using this on my system. Put in /etc/rc.d/rc.local
/usr/sbin/netdate -l 30 ntp.adelaide.edu.au ntp-1.ece.cmu.edu ntp5.tamu.edu
Amish.
I want to synchronise my system time with any external source each time it boots. I've heard of ntp and stuff but I don't really have