What to do at "clr-live login:"?

I tried to install clear-31470-live-server on to a server using USB booting.
At the screen of “clr-live login:”, what should I do?
I tried to put in “root” but it didn’t work.

You’re doing it right. That seems to be an unexpected error.

Is there anything special about the USB drive you’re using? Can you check the integrity of the download and try putting it on the USB again?