Why and How to setup Network Time Protocol (NTP) in Linux

 ** This is applicable in Linux environment (red hat , Centos , Amazon linux ..etc) .

 Why ?

Having different time in each server/client in same environment will lead you with issue in your platform , thus; you will need to configure NTP services in all your server to sync the time via network from same source .

How ?

 

To setup NTP server we use chronyd service as below :

1- make sure chronyd is started and enabled :

systemctl status chronyd

2- if it is not started and enabled use :

systemctl enable --now chronyd

check the status to make sure it is working properly

you can use as well to check all setting : timedatectl

3- Edit the /etc/chrony.conf :

vim /etc/chrony.conf

4- line "pool 2.rhel.pool.ntp.org iburst" , make it with comment to be

 " #pool 2.rhel.pool.ntp.org iburst"

5- now add your ntp server :

server ntp.example.com iburst

where ntp.example.com is ntp server , or ip can be instead of url

6- to check it is work use " :

chronyc sources -v

or use :

 timedatectl