My Mac has gotten pretty dirty from all the stuff I've installed and the files I have accumulated these past months. I have tried reinstalling by holding Command-R and following the process. However, doing so has not cleaned up my file system. In fact all it seems to have done is broken some of my already installed programs (e.g. Xcode and MacPorts). Is there a way to reinstall Lion so that it will behave like its just been taken out of the box?
I have previously been an Ubuntu user, and in Ubuntu I think I was presented with the option of scraping the existing file system when I do a reinstallation.