cloud9 ide - The authenticity of host 'bitbucket.org (131.103.20.168)' can't be established

Question

In Cloud9 I do:

$ git push -u origin --all

The authenticity of host 'bitbucket.org (131.103.20.168)' can't be established.
RSA key fingerprint is 97:8c:1b:f2:6f:14:6b:5c:3b:ec:aa:46:46:74:7c:40.
Are you sure you want to continue connecting (yes/no)?

I added the ssh-key from cloud9 to Bitbucket. Shouldn't that be enough to have Bitbucket authenticated by Cloud9?

Answer 1

No. When you'll first connecting to bitbucket, ssh client on your machine will store RSA fingerprint in file called known_hosts. Then before each connection server fingerprint will be validated with stored one (to avoid man-in-the-middle attack).

So - you need to accept this fingerprint only once (if you're diligent you should compare it with fingerprint provided by bitbucket).