Originally Posted by email@example.com
I got a used dell latitude 2120 with the ubuntu opperating system the laptop came with out a username and password for the log in screen.
Welcome to the forum
If the copy of Ubuntu was not set up for you, I would wipe it and re-install with a distribution of your choice. However, if there is a restore partition, be careful not to delete that!
I also agree with fatmac, using your email address as your username is a bad idea, it makes a good SPAM magnet.