til/Applications/System/chrony.md

chrony

Distribution	Package
Arch Linux	chrony
Ubuntu	chrony

Network Time Security

https://developers.cloudflare.com/time-services/nts/

https://system76.com/time

Edit /etc/chrony/chrony.conf:

server time.cloudflare.com iburst nts
server virginia.time.system76.com iburst nts
server ohio.time.system76.com iburst nts
server oregon.time.system76.com iburst nts

Verify:

chronyc sources -v
sudo chronyc authdata -v