Time Synchronisation
From KlavoWiki
You can easily install NTP (Network Time Protocol, a means of transmitting time signals over a computer network) using yum command under Redhat or CentOS/Fedora core Linux.
Installation
yum install ntp
Turn on service
chkconfig ntpd on
Synchronize
the system clock with ntp.bri.connect.com.au server:
ntpdate ntp.bri.connect.com.au
Starting
Start the NTP:
/etc/init.d/ntpd start
or
service ntpd start