http://www.phcomp.co.uk/Tutorials/Unix-And-Linux/ssh-check-server-fingerprint.html
https://help.github.com/articles/github-s-ssh-key-fingerprints/
https://help.github.com/articles/github-s-ssh-key-fingerprints/
To compare your local key's finger print against the github fingerprint:
ssh-keygen -l -E md5 -f ~/.ssh/joe_rsa
4096 MD5:7a:95:35:2e:e3:47:43:2a:4c:4d:69:51:9d:bb:83:12 joe.smith@any.com (RSA)
