Putty Error No Supported Authentication Methods Available How to Solve "Asunder: No supported authentication methods available (server sent: publickey)" with Ubuntu AWS EC2 This error happened to me and cost me a lot of time to solve it, and couldn't find a solution for information technology online, but afterwards some help from AWS back up, I managed to solve information technology, so I am sharing it hoping it will help others. Background I was trying to connect to Ubuntu AWS EC2 through PuTTy (I've tried other alternatives too) just when I do I go the mistake "Asunder: No supported authentication methods available (server sent: publickey)" Troubleshooting This error tin can occur nether the following circumstances: Yo