Recently I have created a new instance on AWS using Ubuntu 14.04 LTS AMI. As we know AWS allows key based login by default. When I tried to SSH with downloaded server.pem key, I got following warning message on-screen and then it prompts for password of user. Error: $ ssh -i server.pem [email protected] @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@...