[root@server-rhel6 ~]# yum install ntp -y [root@server-rhel6 ~]# date Tue Feb 23 16:43:07 PST 2016 vim /etc/ntpd.conf ====> comment this lines first and add required lines #server 0.rhel.pool.ntp.org iburst #server 1.rhel.pool.ntp.org iburst #server 2.rhel.pool.ntp.org iburst #server 3.rhel.pool.ntp.org iburst restrict 172.16.28.0 mask 255.255.255.0 nomodify notrap server 127.127.1.0 #local clock fudge 127.127.1.0 stratum 10 driftfile /var/lib/ntp/ntp.drift logfile … Continue reading ntp