Dreamerman, did you have a chance to read that link I gave about Ubuntu's policy on root access? Using "sudo -i" is exactly the same as "su" except it uses your user password, instead of the root password. There is really no reason you should need to use "su" to get a root shell. Iaculallad's method of course works, but it is a workaround that gives the same result as "sudo -i". Is there some special reason you want to use "su" instead of "sudo -i"?