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+# [chrony](https://git.tuxfamily.org/chrony/chrony.git)
+
+| 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`:
+
+```txt
+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:
+
+```sh
+chronyc sources -v
+sudo chronyc authdata -v
+```