Make sure ntp is installed.

yum install ntp

Edit /etc/ntp.conf/ and add the following lines where needed:

server hickory.byu.edu 
server dickory​​.byu.edu
server dock.byu.edu​​

These are the BYU time servers. Execute the following: <code>/sbin/chkconfig –level 2345 ntpd on</code> Now ntp will always run on a reboot. Next do to make sure both are using the BYU servers. <code>service ntpd status</code>