During the lesson (Setting up Our VPC Part 2), Ryan shows how to copy your private key to the public EC2 instance while stating that isn’t a secure way to access your private EC2 and I was wondering how I would do it securely. I found this great link that shows the right way to do it, and it’s very easy, at least on a Mac computer. https://aws.amazon.com/blogs/security/securely-connect-to-linux-instances-running-in-a-private-amazon-vpc/
I was able to connect through the public EC2 to the private EC2 without saving my private key on the public computer. Just wanted to share this in case someone else was wondering how to do it.