EC2

Using EC2 Instance Connect to connect to EC2 instances without an SSH client or key pair

CodePipeline

React continuous deployments from Github to S3

EC2

Run custom commands (install Apache) on EC2 instances with AWS Systems Manager and Resource Groups

Certificate Manager

How to create a static website in S3 and use CloudFront to serve it through HTTPS (using free SSL)

IAM

How to share S3 Buckets across AWS accounts with IAM Roles

Amazon Linux

How to run Amazon Linux 2 on premises (locally) as a VM

Route53

How to redirect a root (apex) domain to another domain with Route53

AWS Lambda

Using Amazon EFS (Elastic File System) with AWS Lambda