Install:
sudo apt update
sudo apt install chrony
Start the Chrony service and enable to start on boot:
sudo systemctl start chrony
sudo systemctl enable chrony
Check the status of the service:
systemctl status chrony
Configure service - edit /etc/chrony/chrony.conf:
#pool 2.rhel.pool.ntp.org iburst
server 10.1.4.12 iburst
server 10.1.4.13 iburst
Activate NTP Service:
sudo timedatectl set-ntp true
Restart the service:
sudo systemctl restart chrony
Look at source time servers:
chronyc sources -v
View software clock information:
chronyc tracking
View time server statistics:
chronyc sourcestats
BONUS
To list all services:
systemctl list-unit-files
Disable autostart:
systemctl disable chronyd
Check if autostart is disabled:
systemctl is-enabled chronyd
https://techviewleo.com/how-to-configure-chrony-ntp-server-on-debian/