CentOS Linux install and configure NTP to synchronize the system clock

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.

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:

Note: If you are using VPS (anything other than dedicated server), you will see this issue repeatedly.In such case, it is better to use ntpupdate with crontab utility instead of nptd service – which may fail to work sometimes. I am writing as many users are having the same issue.

Here is how to implement:

Stop the ntpd processes

Create a shell script like this
>vi synctime

Add an entry in cron job
>crontab -e

It runs every five minutes and you are done!