DevOps

What a DevOps professional needs to master at each stage of their career. From the Linux terminal to Kubernetes and the cloud — the concepts that come up in technical interviews and in everyday work, explained directly. Filter by level below.

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Senior

Deploy strategies: blue-green, canary, and rolling

How to ship without taking the system down: recreate, rolling, blue-green and canary — what each one costs in risk, downtime and rollback.

Jun 25, 2026 Read

Junior

Linux and the terminal: the bare minimum every DevOps engineer masters

Permissions, processes, pipes and environment variables. The terminal isn't nostalgia — it's where infrastructure work happens.

Jun 24, 2026 Read

Junior

Git beyond the commit: branches, merge, and workflows

Merge vs rebase, what a conflict is, and the workflows (trunk-based, GitFlow) that organize an entire team's work.

Jun 22, 2026 Read

Junior

CI/CD in practice: from commit to automatic deploy

What continuous integration and delivery mean, what a pipeline is and why automating build, test and deploy changes everything.

Jun 20, 2026 Read

Mid-level

Containers and Docker: why 'it works on my machine' is over

Image, container and how it differs from a VM. Dockerfile, layers and the concept that standardized the environment from dev to production.

Jun 17, 2026 Read

Mid-level

Infrastructure as code: Terraform and the end of clicking through the console

Provisioning servers with versioned, reproducible code. What IaC is, declarative vs imperative and why idempotency matters.

Jun 15, 2026 Read

Mid-level

Observability: logs, metrics, and traces (the 3 pillars)

Monitoring tells you it broke; observability tells you why. Logs, metrics and traces — and the difference between the three in practice.

Jun 13, 2026 Read

Senior

Kubernetes without panic: pods, deployments, and autoscaling

The orchestrator that became the standard. Pod, deployment, service and how Kubernetes keeps your app alive and scaling on its own.

Jun 10, 2026 Read

Senior

Cloud architecture: high availability and the cost of downtime

Regions, availability zones, redundancy and the trade-off between reliability and cost. Designing so that one machine failing doesn't take the system down.

Jun 8, 2026 Read

Senior

DevSecOps: secrets, least privilege, and security shift-left

Security is no longer a final step. Secrets management, least privilege, pipeline scanning and the culture of bringing security to the start.

Jun 6, 2026 Read

Self-assessment: where are you?

Check what you already master. Your progress is saved in this browser only.

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Quiz: test what you learned

Four questions per level, with an explanation and the article that covers each topic. Ace a level and you can mark it in the self-assessment above.