In the AWS management console, I stopped a Linux instance. Then I restarted it. I tried to reconnect via Putty. My putty session has an "Auto-login username" set and a private key for SSH authentication set. AWS's DHCP gave my instance a new IP address upon rebooting. So I changed the IP address in Putty. When I try to connect via Putty I get this error:
"Disconnected: No supported authentication methods available (server sent: publickey,gssapi-keyex,gssapi-with-mic)"
How do I connect via Putty to my Linux instance? I was able to connect fine before I rebooted it using AWS. I tried using a different user. But I don't even get to the password prompt. It says "Server refused our key."