What is the default "root" password?

/docs/users/faq-howto-troubleshooting/faq-root-password/

In UBOS versions prior to September 2020, there was no root password when attempting to log in as root from the local console.

In UBOS versions since September 2020, the default root password is "ubos!4vr" (without the quotes).

You can, and should change this to something else, for example by executing passwd as root.

Network login for root was and continues to be disabled. To log into your device via ssh, use the Shepherd account.