ankushkool wrote:how does de su thing work...
i type su, then it asks 4 password i enter mine it doesnt accept it!!!
When you first installed Ultimate on your computer, you were asked for a name for your computer and a password...you had to type the password in twice, that is the password you must use... if you lost it somehow...read this...
http://forumubuntusoftware.info/viewtopic.php?f=7&t=1888a nice how-to on recovering a lost password...perhaps if you tell us what you are trying to do that requires a password, we can give you more help...sudo..su gives you permission as an administrator to make changes to the computer and operating system...for instance adding or removing programs, deciding what files others might be able to access or change on your computer...etc.
Edit: I found another that I have used before...
http://www.psychocats.net/ubuntu/resetpassword