I have had my ubuntu running for a handful of years and I have screwed with it far to much. Over the last few days I desided to update to 12.04 and not even my terminal will work now. Is there any way to remove all of the things I have downloaded and installed over time to make it just like I freshly installed ubuntu 12.04? I'll be trying to fix my terminal, so if there is a terminal answer, pleae state it. Thank you for your time.