$ ssh -T firstname.lastname@example.org The authenticity of host '[ssh.github.com]:443 (<no hostip for proxy command>)' can't be established. ECDSA key fingerprint is SHA256:p2QAMXNIC1TJYWeIOttrVc98/R1BUFWu3/LiyKgUfQM. Are you sure you want to continue connecting (yes/no/[fingerprint])? yes Warning: Permanently added '[ssh.github.com]:443' (ECDSA) to the list of known hosts. Hi seepine! You've successfully authenticated, but GitHub does not provide shell access.