nixCraft posted a guide about installing OpenNTPD to synchronize the local clock on CentOS/RHEL/Fedora
OpenNTPD is a Unix system daemon implementing the Network Time Protocol to synchronize the local clock of a computer system with remote NTP servers. How do I install OpenNTPD under CentOS / RHEL / Fedora Linux instead of default NTPD client / server?CentOS / Redhat Linux: Install OpenNTPD To Synchronize The Local Clock