I have converted my PEM file to a PPK file and I can successfully connect to the EC2 through Putty or FileZilla using the private key.
Lets say we have a scenario:
I request a new PEM and give the new PPK to somebody. Now I need to stop or refuse access to the server using that particular PPK.
How would I proceed?
(As I understood by reading the documentation, each EC2 instance gets a unique (default) key pair when you create it. The only way to change the default key pair would be by terminating the instance.)