I got the stable release of armbian for the ROCK64, flashed on a sd-card aaaaaaaand ... wrong password.
root + 1234 doesn't work.
Has the password been changed?
I tried the following combinations:
root:1234
ROOT:1234
root:!"§$ (german keyboard, don't know whats on en)
armbian:armbian
rock64:rock64
All passwords are incorrect.
I try it with xenial and strech. (Files of the direct download)