Originally Posted by T3RM1NVT0R

I have performed the installation of Ubuntu 10.04 without disabling/changing any parameter but it didnt ask me the root password during the installation. Later when I tried to login using root it wasn't accepting the password (obviously because no root password was set). What I am trying to say here is that it uses the root account but the root password setting option you do not get during installation (This I have checked in Debian, Ubuntu, Linux Mint) it is set to some default hash value as no root password is a security breach.

Any of the flavours derived from Debian does not prompt use of root for regular daily task and that is the reason they give sudo access to the user account created during install. Once the installation is done and if you would like you can reset the root password.