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555+ simulators, quizzes, and hands-on exercises for engineers who prefer a terminal over a slide deck.
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Interactive Simulators
DNS Resolution Simulator
Walk through the full DNS resolution process step by step
Kubernetes Scheduler
Place pods on nodes based on resource requests and constraints
Load Balancer Simulator
Compare round-robin, least connections, and weighted algorithms
CI/CD Pipeline Builder
Design a deployment pipeline with stages, gates, and rollbacks
Caching Simulator
See how cache hit rates change with different strategies
DDoS Defense
Protect your infrastructure from simulated attack patterns
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Popular Categories
Explore our content by topic
Docker
Containerization platform
Terraform
Infrastructure as code
Git
Git and version control for developers
Kubernetes
Container orchestration and management
Linux
Linux operating system and distributions
Bash
Bash scripting and command line
DevOps
DevOps practices and tools
Networking
Networking concepts and practices
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Hands-On Exercises
Practice real-world DevOps scenarios with step-by-step guidance
Git Workflow and Collaboration Fundamentals
Master essential Git workflows, branching strategies, and collaboration techniques used in modern development teams.
Redis Caching Strategies for Scalable Applications
Implement production-ready caching patterns with Redis to dramatically improve application performance and scalability.
Linux Performance Tuning and Troubleshooting
Master essential Linux performance analysis and optimization techniques to diagnose and resolve system bottlenecks.
Nginx Load Balancing and Reverse Proxy
Master load balancing and reverse proxy patterns with Nginx to build resilient, scalable infrastructure.
Complete Web Server Automation with Ansible
Build a comprehensive Ansible playbook to automate web server deployment, configuration, and security hardening across multiple environments.
Deploy a DigitalOcean Droplet with Terraform
Learn Infrastructure as Code basics by deploying a simple web server on DigitalOcean using Terraform. Perfect for beginners starting their IaC journey.
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Test Your Knowledge
Short interactive quizzes across Docker, Kubernetes, Terraform, networking, and more
Ansible Configuration Management Quiz
Configuration Management
Test your Ansible skills with playbooks, roles, inventory management, and automation scenarios for infrastructure configuration
GitOps with Argo CD: Multi-Environment Repository Structure Quiz
GitOps
Test your knowledge of structuring Git repositories for Argo CD deployments across dev, staging, and production environments. Covers repo layout patterns, ApplicationSets, Kustomize overlays, Helm value files, and sync policies.
AWS Cloud Services Quiz
AWS
Master cloud architecture through real-world AWS scenarios covering compute, storage, networking, and best practices
CI/CD Fundamentals Quiz
CI/CD
Master the basics of Continuous Integration and Continuous Deployment, including pipelines, version control, automated testing, and deployment strategies
CI/CD Pipelines Quiz
CI/CD
Master continuous integration and deployment with practical pipeline scenarios and best practices
Cloud Cost Allocation Tags Quiz
FinOps
Debug tagging gaps, fix broken cost reports, and set up consistent allocation tags across AWS, GCP, and Azure for accurate chargeback and showback
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Latest Posts
Stay up to date with the latest DevOps content
How Does It Work So Fast? The Engineering Behind Instant UI Responses
Credit card validation, username checks, autocomplete, URL shorteners - they all feel instant. Here is what is actually happening under the hood in each case.
Two Composer Command Injection Flaws Let Attackers Run Arbitrary Code - Even Without Perforce
CVE-2026-40176 and CVE-2026-40261 affect all Composer 2.x versions. A malicious composer.json or crafted package metadata can execute OS commands on your machine. Upgrade to 2.9.6 now.
SLOs, SLIs, and Error Budgets: A Practical Implementation Guide
Your service went down at 2 AM and nobody could agree on whether it was "bad enough" to page someone. SLOs, SLIs, and error budgets fix that. Here is how to define, measure, and act on them with real Prometheus queries and alerting rules.
Best Claude Code Plugins for DevOps Engineers in 2026
A curated guide to Claude Code plugins built for DevOps workflows - from Terraform validation and Kubernetes troubleshooting to security scanning and CI/CD pipeline optimization.
Claude Code: Agents, Commands, Skills, and Plugins Explained
A clear breakdown of the four extension types in Claude Code - what each one does, how they differ, and when to use which. No marketing fluff, just practical explanations with examples.
CLI vs MCP: When to Use Each for AI-Powered DevOps
CLI tools and MCP servers both let AI agents interact with your infrastructure, but they solve different problems. Here is when to reach for each one and why the answer is usually both.
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Latest Guides
Step-by-step tutorials to boost your DevOps skills
Security Gates
Implement automated security gates that block deployments on critical vulnerabilities, policy violations, and security failures. Shift security left in your CI/CD pipeline.
Introduction to Packer
Learn how to build automated machine images with HashiCorp Packer, from basic concepts to multi-platform image creation
Introduction to AWS
Learn AWS fundamentals step by step, from basic concepts to building your first cloud application.
Introduction to Python
A practical guide to Python programming from basics to building real projects
Introduction to Docker
Learn how to use Docker to build, ship, and run applications efficiently through containerization
Introduction to Kubernetes
Kubernetes introduction covering architecture, pods, deployments, services, and scaling for container orchestration
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