Go to:
https://gist.github.com/developius/c81f021eb5c5916013dc
$ ssh -T git@github.com
The authenticity of host 'github.com (192.30.253.112)' can't be established.
RSA key fingerprint is SHA256:nTh....
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'github.com,1xx.xx.xx.xx' (RSA) to the list of known hosts.
Enter passphrase for key '/Users/uki/.ssh/id_rsa':
Hi UkiDLucas! You've successfully authenticated, but GitHub does not provide shell access.
$ ssh -T git@github.com
The authenticity of host 'github.com (192.30.253.112)' can't be established.
RSA key fingerprint is SHA256:nTh....
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'github.com,1xx.xx.xx.xx' (RSA) to the list of known hosts.
Enter passphrase for key '/Users/uki/.ssh/id_rsa':
Hi UkiDLucas! You've successfully authenticated, but GitHub does not provide shell access.