If you get this message:
WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!
when trying to use ssh to login, you can run this command:
ssh-keygen -R</pre> If ssh-keygen fails, check your `.ssh/known_hosts` file for the entry and delete it. By the way, do this only if you're sure of what you're doing. The reason I wrote this, is that I've encountered this message a few times with some VirtualBox machines. You might want to double check this ( or probably not do it at all ), if this happens for a machine connected to the internet ( think staging/prod servers )