AWS Linux instance connection Now that putty has been configured to use a proxy and a private key you can try to connect to the server hosted in the Amazon Cloud.By default, the username that you will have to use to connect to the server hosted in Amazon Cloud and to which the RSA key is associated to is the ec2-user.At the login prompt enter ec2-user for username and you will be prompted to enter the Key passphrase that you have set for the private key that you have generated with puttygen.exe.Now that you have access to the server, you may wish to set the remote access for root.Use: sudo passwd root to generate a new password for root, then use su root to become root and change the configuration settings for ssh.Run vi /etc/ssh/sshd_config, set PermitRootLogin yes, PasswordAuthentication yes, save the file, run service sshd restart and from now on you should be able to login to the server using the root, without using any previous RSA key or the ec2-us...