AWS fundamentals
Each guide starts in plain English, then shows how the thing actually works, how to build it, and how to troubleshoot it. Every fact is checked against the AWS documentation, and each guide says what was run and what was only reviewed.
- Amazon VPC explained
Your private network in AWS: subnets, route tables, internet and NAT gateways, security groups, a load balancer and a private database, with an interactive diagram and fixes for the usual connectivity failures.
- AWS IAM explained
Who can do what: users, groups, roles and policies, the order in which AWS checks them, how to read an AccessDenied message, and an explorer that shows which policy blocks a request.
- Amazon S3 explained
Storage for files of any size: buckets and objects, Block Public Access and bucket policies, sharing with presigned URLs, static websites, and an explorer that shows whether the internet can read an object.
- Amazon EC2 explained
Virtual servers: instance types and names, connecting without opening port 22, what stop, reboot, hibernate and terminate keep and lose, IMDSv2, user data, and fixes for SSH errors.
Launching instances? The article on EC2 and VPC covers keys, Session Manager, IMDSv2 and user data.
Planning address ranges? The CIDR calculator splits a VPC range into subnets.