General Information
Time is important on any system for automated jobs, log files, security, etc. This quick how to will get NTP up and running on a Linux server.
Checklist
The packages:
yum install ntp ntpdate ntp-doc
chkconfig ntpd on
ntpdate pool.ntp.org
Visit http://www.pool.ntp.org/zone/north-america and verify the current ntp servers.
They most likely are still (2015-01-07):
Add the above server lines to /etc/ntp.conf in place of the default servers.
vim /etc/ntp.conf
Finally, start the NTP daemon service.
/etc/init.d/ntpd start