How to install/configure/enable NTP service?

-> Install ntp service
# yum install ntp

-> Once NTP server pool zones are taking
e.g. check from https://www.pool.ntp.org/zone/europe

-> Add specific pool zones into config file if they are not existed
# vi /etc/ntp.conf
server 0.europe.pool.ntp.org

-> Enable service
# systemctl enable ntpd

-> Run service
# systemctl start ntpd 

-> Lastly, check the service and the settings

# timedatectl