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631+ 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
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Docker
Docker articles, tutorials, and guides on DevOps Daily covering containers, images, Dockerfiles, Compose, volumes, networking, and production best practices.
Terraform
Infrastructure as code
Kubernetes
Container orchestration and management
Git
Git and version control for developers
DevOps
DevOps practices and tools
Linux
Linux operating system and distributions
Bash
Bash scripting and command line
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
Test your CI/CD pipeline knowledge with scenarios covering build stages, artifact promotion, environment strategy, deployment patterns, and rollbacks.
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
Kubernetes 1.37 Just Locked Its Feature Set: What Made the Cut
The enhancements freeze for Kubernetes 1.37 landed on June 17, so the shape of the August release is now decided. GPU partitioning keeps maturing for AI workloads, and a cgroup v1 change will stop some kubelets from starting. Here is what is locked in and what to check before you upgrade.
The gRPC-Go Auth Bypass Hiding in Your Dependency Tree: CVE-2026-33186
A missing leading slash lets requests slip past gRPC-Go authorization rules. It is a CVSS 9.1, it is fixed in 1.79.3, and because gRPC-Go is a transitive dependency in a huge slice of cloud-native Go, you may be shipping it without knowing. Here is how to find out.
Your First Serverless LLM Call on DigitalOcean in 10 Minutes
DigitalOcean's Inference Engine gives you an OpenAI-compatible endpoint with pay-per-token pricing and no GPU to manage. Here is the fastest path from zero to a working call, with curl, Python, and Node, every snippet run against the live API.
Secrets Management Best Practices with HashiCorp Vault
Run HashiCorp Vault the way production needs it: auto-unseal, AppRole auth for machines, dynamic database credentials that expire on their own, and encryption as a service. Real config, real terminal output.
AI SRE Agents: What They Actually Fix, and What They Will Happily Break
AI SRE is now its own category, with every incident vendor shipping an agent that investigates and remediates on its own. Here is the honest split: where these agents genuinely earn their keep, where they are oversold, and the one risk nobody puts on the marketing page.
Hetzner Doubled Its Prices Again. The AI Memory Crunch Is Why
On June 15, 2026, Hetzner raised prices on new orders by roughly 99% in Germany and 158% in the US, the latest in a string of 2026 increases. It is not greed and it is not just Hetzner: the AI memory supercycle has reached the infrastructure bill of teams that never touch AI.
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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 step by step by building a real cloud application. Covers IAM, EC2, S3, VPC, RDS, load balancing, Lambda, CloudWatch, and cost control.
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DevOps Tools and Calculators
Free, browser-only utilities. CIDR, JWT, base64, UUID, cron, K8s sizing, YAML. No sign-up, no server.
CIDR Calculator
CIDR subnet calculator: parse a CIDR block to get network range, subnet mask, broadcast address, usable IPs, and check whether an IP belongs to the network.
JWT Decoder
JWT decoder that parses the header, payload, and signature in your browser. Shows human-readable expiry and issued-at, with no token sent to any server.
Base64 / URL
Encode or decode base64 and URL-safe strings. Handy for secrets, Kubernetes manifests, and API debugging.
UUID / Secret
Generate UUIDs (v4, v7), random hex tokens, and base64 secrets suitable for Kubernetes secrets or API keys.
Cron Parser
Cron expression parser that translates schedules into plain English and previews the next 5 run times in your local timezone. Validates 5 and 6-field syntax.
K8s Resources
Size CPU and memory requests / limits for a Pod based on workload characteristics, replicas, and headroom.
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