I accidently removed my entire /usr directory thanks to RVM. I can still use the terminal prompt with Ctrl+Alt+F6, but I don't have any sudo (I guess it's because of the missing /usr).
Is there any way to recover my files?, I didn't reboot yet. If not how can I make sudo and the other things work again without completly reinstalling the OS? I'm runnig Ubuntu 12.04.