default password for ubuntu?

[flyingwasabi]

i just installed ubuntu 20 64bit using raspberry pi imager, it runs but i dont knwo that username/password.
i tried root/(empty) root/root ubuntu/ubuntu pi/raspberry, but none of them worked.

does anyone know the password?
thanks

[Amen8]

from the official wiki page of ubuntu here (dedicated to Raspberry pi machines)
the default password is: ubuntu

[cjan]

ubuntu/ubuntu, and you need wait minutes after boot.

[waveform80]

Yes, the default username is "ubuntu" and password is "ubuntu". As others have noted you need to wait a couple of minutes after boot as the user does not exist by default; the cloud-init process is responsible for setting up the default user and does so after the first boot has finished. Due to the (obviously) insecure nature of the default password, it's pre-expired and you'll need to change it on first login.

If you prefer to set up the initial user and password yourself (customizing cloud-init's configuration) there's some instructions in this post.