How to log in Ubuntu with the root account

In retrospect, my linux study is always abstracted and incontinuous. But now, i resolve to learn it by heart. Ok, firstly download it and then install the full version(mine is 7.04) but not a virtual one that run on a WMware.

In the process of this installation, we can configure user account but not root account and user account as usual. The process is plain, but where is the root account?How can we logon with root?

From the point of Ubuntu, root is not as important as before. That is to say, user account is the default. If we want to use root, we should do some extra work.

1) create root's passwd from your user's terminal

Terminal

yangsq@my-laptop: ~$ sudo passwd root
Password:

then input yangsq's passwd

Terminal

Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully

input the root passwd two times.OK

2) configure the System

from the toolbar:

System -> System manage -> Login window -> Security :

check the "Allow local system administrator login"

ok, that's all, click on "close"

Now, you can "log out" or "switch user", and then logon using your root account.