When I am sending a file to amazon ec2, I am facing a error like this: Unable to load key file ".ppk" (PuTTY key format too new).I have tried so mmany things but did not work.

CodePudding user response：

Please check your PuTTY version. You also can check this link : https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/TroubleshootingInstancesConnecting.html#TroubleshootingInstancesConnectingPuTTY