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AWS Organizations & Account Structure
How AWS Organizations, organizational units, and the AWS account itself form the real isolation boundary, and why that structure - not any single resource - is where governance and billing actually happen.
Azure Fundamentals
How Azure organizes resources through management groups, subscriptions, and resource groups, and why that hierarchy, not the resources themselves, is where most governance actually happens.
Bash Fundamentals
The scripting layer built on top of the shell - variables, conditionals, loops, and functions - and the quoting and exit-status habits that separate a script that looks right from one that fails safely.
Docker Fundamentals
How images, containers, volumes, and networks fit together in Docker's runtime model, and the mental shift from "installing software" to "running a packaged image" that trips up newcomers.
Git Fundamentals
How the working directory, staging area, and commit history actually relate to each other, and why understanding that three-stage model makes branching, rebasing, and undoing changes stop feeling arbitrary.
Kubernetes Fundamentals
How Pods, Deployments, and Services fit together, what the control loop actually does, and why Kubernetes networking confuses people coming straight from Docker Compose.