In F14 LXDE Live, if you try runlevel 3 (added to kernel arguments) it
will first ask for a password and you enter "
root" . . .
however, IF it is the boot through the automatic login in the runlevel 5 that gets you to the desktop . . .
and if you go to the LX terminal, it is the usual ( a switch user followed by space and hyphen) :
No password is asked for.
but, . . .
IF you are in an
installed F14 LXDE
from the Live CDiso, it
will ask for the password next in the LX terminal after the su -
(that password is what was entered during the first few steps of the install from Live CD - must be six letters at least - will tell you it is weak password no matter what practically!)
Also, btw . . . if you do anything such as mkdir or move files or mount
as root in the LX terminal,
and then try to do things on the desktop as the liveuser,
it will ask for authentication - a hassle.
Hope this helps some, as well as these other replies - Good luck.