Your last questions are not related to the first one. Anyway...
After login root's directory explore automaticaly.
What is the problem.
this is not clear at all. What do you mean for "explore automatically"? If the browser starts automatically, maybe a previous X session has been saved and the previous state is restored upon a new login. Moreover, is not a good practice to login as root in the X server for a lot of security reasons.
can we login in the server using ssh and i dont know the passwd of the server.
No. You can't, at least not in a legal way. Please, explain better this question: did you forgot your password? Is it a machine you administer or is it a remote server belonging to someone else?