Ever have this problem? You just rebuilt a machine, and when you go to SSH into it, you get the following message: @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Many people just go edit their ~/.ssh/known_hosts file and carry on. But there is a faster/better way! OpenSSH comes with a command called ssh-keygen that allows you to generate and manage all your keys, including your ssh fingerprints.