I am new to Ubuntu and to Linux. I was attempting to figure out a way to grant access to files to my whole family (photos go into everyone's photo folder, etc. in unity). After working on this problem for hours, and not finding the right answers, I decided to open up my original user account to everyone. I renamed it. Big mistake. Now Ubuntu is not accepting my password. All processes and apps are running under my old user name, which no longer appears under User Accounts, naturally. How do I fix this?