SoftGeekRO / rplcd_timeserver

Raspberry PI i2c LCD GPS NTP server

Raspberry PI NTP server

https://engineering.fb.com/2020/03/18/production-engineering/ntp-service/

http://www.satsignal.eu/ntp/Raspberry-Pi-NTP.html

http://www.satsignal.eu/ntp/Raspberry-Pi-quickstart.html

https://tools.ietf.org/html/rfc958

https://www.monitorix.org/

https://rplcd.readthedocs.io/en/stable/index.html

Chrony

https://chrony.tuxfamily.org/index.html

https://docs.fedoraproject.org/en-US/Fedora/18/html/System_Administrators_Guide/sect-Checking_if_chrony_is_synchronized.html

NTPD

https://github.com/cf-natali/ntplib