I don't use Ubuntu, but you should be able to do a sudo sh and get a root shell. That is unless that command is blocked.

On 7/20/07, Eric Shubes < plug@shubes.net> wrote:
Erich Newell wrote:
> To save myself some typing, I usually do the following:
>
> prompt> sudo passwd root
> prompt> Enter new UNIX password:  ***
> prompt> Retype new UNIX password: ***
> prompt> su
> Password: ***
> prompt>
>
> Granted, I wouldn't recommend a 3 character password if you have any
> services enabled which are remotely accessible by root...but if I have
> to boot off a LiveCD its most likely because my system is b0rked anyhow.
>
> $0.02
>

If you want to be able to su but don't want to set a root password, you can
simply
$ sudo su -
and use your normal account password.

--
-Eric 'shubes'
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