View source for NTP: Server Time Sync

To sync time on server , you need ntpdate utility.

On Centos:
yum install ntp

On debian:
apt-get install ntpdate


So we can sync time with public NTP server:
ntpdate pool.ntp.org



Make periodically sync time:

touch /var/log/ntpdate.log
crontab -e

and insert:

04      0,8,16  *       *       *       root    ntpdate pool.ntp.org >>/var/log/ntpdate.log
<Press ENTER>

And save.
That's all