Userid and Password for localhost:631 on Lubuntu Live USB Session

(Background)

I'm testing Lubuntu for future installation via a live USB. I'm making sure I can print to the network printer (it works fine on my ubuntu 12.04 actual install). When I try to set server settings in the printer admin dialog, I get

CUPS server error There was an HTTP error: not found

searching askubuntu.com led me to try localhost:631 to change the server settings instead. However, I am being prompted for a userid and password.

(Question)

What is the userid and password to use for localhost:631 on a Lubuntu live USB session?

1 Answer

IIRC the credentials should be root's. So set a root password and test it out:

sudo passwd