NTP is used to sync the network servers time with global one.Restarting NTP is require in some case when automatic NTP IP is not picked up. We need to use below command in Linux to restart NTP

To start NTP:
systemctl start ntpd 

To stop NTP:
systemctl stop ntpd

To check status of  NTP:
systemctl stop ntpd

We can use above commands to restart,stop checking the status of NTP in linux