DevOps Foundations
Start here: Linux, Git, Docker, and the language you need to automate daily operations.
DevOps learning library
Master Class Commands
A revived, product-ready command reference for infrastructure engineers: searchable guides, production examples, troubleshooting notes, learning paths, and a copy-ready command index.
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1,741commands
21categories
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Pick the path closest to your current goal, then work through the guides in order.
Platform Engineer
Build toward orchestration, infrastructure as code, configuration management, and delivery pipelines.
Production Operator
Operate real systems with observability, troubleshooting, cloud CLI usage, and disaster recovery patterns.
- Monitoring & Observability Master Class
- DevOps Troubleshooting Guide
- Security & Compliance Master Class
- Microsoft Cloud Identity & Security Master Class
- Conditional Access Master Class
- Microsoft 365 Administration Master Class
- Networking Fundamentals Master Class
- AWS CLI Commands Master Class
- Real-World DevOps Scenarios
Microsoft Cloud Operator
Operate Azure CLI, Entra ID, Conditional Access, Microsoft 365, and compliance workflows as one production track.
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31 guides shown.
Automation
Ansible Master Class
Engineering-Grade Reference Manual for Ansible
18 min read · 1,806 linesCloudAWS CLI Commands Master Class
Engineering-Grade Reference Manual for AWS CLI
7 min read · 672 linesCloudAzure CLI Commands Master Class
Engineering-grade reference manual for Azure CLI operations across resource groups, compute, storage, networking, AKS, Functions, Monitor, Key Vault, and Azure DevOps.
7 min read · 580 linesQuick ReferenceDevOps Cheat Sheets Collection
Quick Reference Cards for All Master Classes
4 min read · 396 linesCI/CDCI/CD Pipeline Patterns Master Class
Engineering-Grade Reference Manual for CI/CD Pipelines
21 min read · 2,199 linesEdge NetworkingCloudflare Infrastructure Master Class
Engineering-grade reference manual for Cloudflare infrastructure operations across DNS, tunnels, Zero Trust Access, WAF rules, cache controls, certificates, and observability.
2 min read · 163 linesMicrosoft CloudConditional Access Master Class
Production-ready Microsoft Entra Conditional Access guide for safe report-only validation, break-glass protection, staged enforcement, policy templates, monitoring, and rollback.
4 min read · 221 linesDatabasesDatabase Administration Master Class
Engineering-Grade Reference Manual for Database Administration
4 min read · 370 linesContainersDocker Commands Master Class
Engineering-Grade Reference Manual for Docker
9 min read · 666 linesVersion ControlGit Advanced Workflows Master Class
Engineering-Grade Reference Manual for Git
21 min read · 1,599 linesReferenceDevOps Glossary
Comprehensive DevOps Terminology Reference
6 min read · 381 linesCloudGoogle Cloud Platform Infrastructure Master Class
Engineering-grade reference manual for GCP infrastructure operations across projects, IAM, VPC networks, firewall rules, routes, load balancing, Cloud NAT, Cloud DNS, logging, packet mirroring, and Network Intelligence Center.
4 min read · 340 linesSecurityHashiCorp Vault Operations Master Class
Production-focused reference for operating HashiCorp Vault safely: health checks, authentication, secrets engines, policies, tokens, leases, audit devices, snapshots, and recovery workflows.
4 min read · 296 linesContainersKubernetes Master Class
Engineering-Grade Reference Manual for Kubernetes
21 min read · 1,705 linesSystemsLinux System Administration Master Class
Engineering-Grade Reference Manual for Linux System Administration
21 min read · 1,449 linesMicrosoft CloudMicrosoft 365 Administration Master Class
Practical Microsoft 365 operations guide for tenant administration, Exchange Online, Teams, SharePoint, OneDrive, licensing, Purview, audit evidence, and safe governance workflows.
4 min read · 200 linesMicrosoft CloudMicrosoft Cloud Identity & Security Master Class
Practical operator guide for Microsoft Entra ID, Microsoft 365 administration, Conditional Access, Microsoft Graph PowerShell, and safe identity-security rollout patterns.
4 min read · 218 linesOperationsMonitoring & Observability Master Class
Engineering-Grade Reference Manual for Monitoring & Observability
7 min read · 696 linesNetworkingNetworking Fundamentals Master Class
Engineering-grade reference manual for TCP/IP, DNS, routing, subnetting, load balancing, VPNs, CDN behavior, and network troubleshooting.
6 min read · 534 linesInfrastructure as CodeOpenTofu Infrastructure as Code Master Class
Engineering-grade reference manual for OpenTofu infrastructure operations: init, format, validate, plan, state inspection, workspaces, modules, providers, and safe apply workflows.
2 min read · 183 linesVirtualizationProxmox VE Infrastructure Master Class
Engineering-grade reference manual for Proxmox VE operations across nodes, clusters, storage, networking, virtual machines, containers, snapshots, backups, and read-only health checks.
2 min read · 235 linesAutomationPython for DevOps Master Class
Engineering-Grade Reference Manual for Python in DevOps
3 min read · 342 linesScenariosReal-World DevOps Scenarios
Practical Integration Guide
15 min read · 1,329 linesWeb InfrastructureReverse Proxy Operations Master Class
Production operations reference for NGINX, Traefik, and Caddy: configuration validation, routing, TLS, upstream health, observability, safe reloads, troubleshooting, and rollback.
5 min read · 306 linesSecuritySecurity & Compliance Master Class
Engineering-grade reference manual for practical DevOps security, compliance controls, and audit-ready automation.
7 min read · 571 linesService MeshService Mesh Master Class
Engineering-grade reference manual for Istio, Linkerd, Consul, traffic management, mTLS, observability, and production service-mesh operations.
7 min read · 611 linesAutomationShell Scripting (Bash) Master Class
Engineering-Grade Reference Manual for Bash Scripting
5 min read · 475 linesInfrastructure as CodeTerraform with Azure Master Class
Engineering-Grade Reference Manual for Terraform & Microsoft Azure
18 min read · 1,790 linesTroubleshootingDevOps Troubleshooting Guide
Common Problems and Solutions
4 min read · 409 linesVirtualizationVMware PowerCLI Master Class
Engineering-grade reference manual for VMware vSphere operations with PowerCLI: connection context, inventory, VM lifecycle, networking, datastores, snapshots, templates, and evidence collection.
2 min read · 193 linesWindows ServerWindows Server PowerShell Master Class
Engineering-grade reference manual for Windows Server operations with PowerShell: discovery, services, networking, roles, events, storage, Active Directory checks, remoting, and safe administration.
2 min read · 217 lines