Procedure
Login as the root user
Type the following command to install ntp
Turn on service
Synchronize the system clock with 0.pool.ntp.org server:
Start the NTP:
# yum install ntpTurn on service
# chkconfig ntpd onSynchronize the system clock with 0.pool.ntp.org server:
# ntpdate pool.ntp.orgStart the NTP:
# /etc/init.d/ntpd start