Connecting to EC2 with Putty(SSH): Server refused our key error

I’m going to assume you are using  Putty on a Windows machine, this error usually happens because you are using your Amazon private key file, and Putty doesn’t support the format of such file, so  you will need to convert this Amazon file to Putty format, to do this you will need to PuTTYgen, which is a Putty tool for this purpose. for more details see AWS docs here and  scroll to the section “Connecting from a Windows machine”.

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