#DevOps.
DevOps tutorials covering culture, practices, and tools for building, testing, and deploying software efficiently.
How to Connect Cursor to Custom MCP Servers: Step-by-Step Guide
The ultimate deep-dive guide to Model Context Protocol (MCP) in Cursor IDE. Build custom TypeScript stdio servers, configure mcp.json, and debug tool calls.
Production Docker Compose Stack: Traefik SSL, PostgreSQL & Backups
Production-ready Docker Compose template with Traefik v3, Let's Encrypt SSL, PostgreSQL 16, and automated S3 pg_dump backup sidecars.
Top 10 Self-Hosted DevOps Tools in 2026 (Portainer & Uptime Kuma)
The definitive 2026 deep-dive guide to top self-hosted DevOps tools. Portainer, Uptime Kuma, HyperDX, Coolify, Traefik, and OpenTofu Docker Compose configs.
Uptime Kuma Docker Setup & Alerting Guide (Discord & Telegram)
Step-by-step guide to deploying Uptime Kuma with Docker Compose. Configure HTTP/TCP monitors, status pages, and instant Discord/Telegram alerts.
AI Code Review in 2026: CodeRabbit vs Greptile vs SonarQube
Compare CodeRabbit, Greptile, SonarQube, and Copilot Autofix in 2026. Discover benchmark speed, hallucination rates, and pricing for engineering teams.
How to Install Lightweight Kubernetes (K3s) on Ubuntu (2026)
Learn how to install and configure K3s lightweight Kubernetes on Ubuntu 24.04/22.04 LTS with kubectl, non-root access, and Traefik ingress.
How to Install Redis Server & Redis CLI on Ubuntu & Linux (2026)
Step-by-step guide to installing Redis Server and Redis CLI on Ubuntu 24.04/22.04 LTS via official APT repository with security, password, and systemd setup.
How to Fix apt & dpkg 'Could Not Get Lock' Errors on Ubuntu & Debian
Safely fix Debian/Ubuntu apt and dpkg lock errors by checking running processes, stopping update services, removing stale locks, and repairing dpkg.
How to Fix Debian/Ubuntu Initramfs Boot: fsck & Rescue Steps
Stuck at an initramfs prompt or black screen? Follow safe, step-by-step fsck and rescue steps to fix Debian/Ubuntu boot failures.
Best VPS for Self-Hosting in 2026: Hostinger vs DigitalOcean vs Vultr
A detailed, fact-checked comparison of the top VPS providers for self-hosting in 2026: real pricing, specs, and setup guidance for Hostinger, DigitalOcean, and Vultr.
How to Clean Journal Logs on Ubuntu and Debian Safely
Check, rotate, and vacuum systemd-journald logs on Linux. Set permanent disk limits to prevent future log growth.
Cloudflare Drop: Zero-Account Instant Static Web Hosting Guide
Discover Cloudflare Drop, the zero-friction tool to instantly deploy static sites via drag-and-drop. Learn features, file limits, security, and how to make pages permanent.
Fixing the 'Vite Module Runner Has Been Closed' Error in Astro
A complete step-by-step engineering guide to debugging the Vite runner closed error during astro:build:done. Learn static ESM imports and subprocess spawn patterns.
Advanced Terraform Cloud-Scale State Cheatsheet
Manage infrastructure at scale: Terraform workspaces, backend state locks, refactoring resources, dynamic blocks, and import workflows.
GitHub Actions Advanced YAML Pipelines Cheatsheet
Optimize CI/CD pipelines: GitHub Actions environments, concurrency controls, custom reusable workflows, matrices, and cache optimizations.
PromQL Alerting Cheatsheet: Prometheus & Grafana
Write high-performance Prometheus monitoring rules: PromQL selectors, vector matching, rates, offsets, and alert configurations.
PostgreSQL Performance Tuning: Indexing, Queries, and Configuration
Practical PostgreSQL performance guide for developers. Indexing strategies, query optimization with EXPLAIN ANALYZE, memory tuning, and connection pooling. PostgreSQL 18 benchmarks included.
AWS IAM Policies & Boundaries Cheatsheet: The Complete Reference
Master advanced AWS security: IAM policy structure, Permissions Boundaries, Attribute-Based Access Control (ABAC), and Service Control Policies (SCPs).
AWS EKS Production Tuning Cheatsheet: The Complete Reference
Scale Kubernetes on AWS: EKS compute nodes (Karpenter), networking (VPC CNI), IAM Roles for Service Accounts (IRSA/EKS Pod Identities), and cost optimization.
DevOps Pipeline with Free Tools: Complete CI/CD Setup Guide 2026
Build a production-grade DevOps pipeline using free tools: GitHub Actions, Docker, CodeRabbit, SonarCloud, and Render. Step-by-step CI/CD setup with zero monthly cost.
Best AI Code Review Tools in 2026: Comparison & Guide
Compare CodeRabbit, GitHub Copilot Code Review, Amazon CodeGuru, Qodo, and GitLab Duo. Pricing, accuracy benchmarks, integration depth, and which to use for your team.
Debugging Node.js OOM in Docker: V8 Heap Profiling Guide
A complete step-by-step guide to troubleshooting containerized Node.js memory leaks. Configure automatic V8 heap snapshot captures and connect securely to production containers.
Terraform Cheat Sheet: IaC Commands, HCL & State
Complete Terraform reference — init, plan, apply, state, modules, variables, outputs, workspaces, and OpenTofu equivalents for infrastructure as code in 2026.
mise Cheat Sheet: Unified Runtime & Tool Manager (2026)
Complete mise reference — install and switch Node, Python, Rust, Go versions, manage tools, activate via shell, Docker, and CI/CD with working commands.
GitHub Actions Cheat Sheet: Workflows, Jobs & Recipes
Complete GitHub Actions reference — triggers, jobs, secrets, matrix builds, caching, artifacts, and real-world recipes for CI/CD pipelines in 2026.
Ansible Cheat Sheet: Inventory, Playbooks, Roles & Ad-hoc Commands
Complete Ansible reference — inventory management, playbook syntax, roles, handlers, conditionals, loops, vault, and best practices for configuration management in 2026.
![300+ Free Google Cloud Skills Boost Badges [2026]: Full Catalog](/og/reference/learning/google-cloud-skills-boost-badges.webp)
300+ Free Google Cloud Skills Boost Badges [2026]: Full Catalog
Complete catalog of 300+ free Google Cloud Skills Boost badges in 2026. Organized by role — AI/ML, DevOps, Data, Security. Includes free vs. paid tier breakdown and career path recommendations.
ClickHouse Cheat Sheet: Commands, Schema Design & Performance
Complete ClickHouse reference — SELECT patterns, aggregations, array functions, window functions, schema design, materialized views, row-level security, and performance tuning in 2026.
Cloudflare Workers Cheat Sheet: Edge Functions & Durable Objects
Complete Cloudflare Workers reference — Hono/fastify on the edge, Workers AI inference, KV, R2, D1, Durable Objects, queues, and deployment with Wrangler in 2026.
Advanced Hermes Agent: Optimization, Scaling & Learning Loop Tuning
Make your Hermes Agent production-grade. Optimize the learning loop, scale to thousands of users, and tune every parameter.
Hermes Agent Setup Checklists: Personal, Team & Production
Three copy-paste checklists for Hermes Agent. Personal setup (15 min), team deployment (1 hr), and production security (before go-live).
Hermes Agent Config Templates: 5 Copy-Paste Ready Setups
Ready-to-use Hermes Agent config files for personal, team, production, enterprise, and hybrid setups. Copy, paste, adjust one value, done.
Install Hermes Agent in 15 Minutes: Complete Setup Guide
One bash command and you're done. Here's the exact step-by-step installation for Hermes Agent on Linux, macOS, and Windows.
wget vs curl: When to Use Each (Complete Guide)
Learn the real differences between wget and curl. When to use wget for downloads and site mirroring, and when to reach for curl for APIs and HTTP debugging.
Top 10 Claude Code Routines for High-Speed Engineering
Master the cloud-hosted automation power of Claude Code. From autonomous testing and refactoring to documentation drift detection, these 10 routines will transform your development speed in 2026.
20+ Things to Do After Installing Ubuntu 26.04 Resolute Raccoon
The ultimate post-installation checklist for Ubuntu 26.04 Resolute Raccoon. From Kernel 7.0 optimizations and UI polish to setting up a high-speed developer toolchain in 2026.
Claude Code Routines: The 24/7 Digital Workforce That Never Sleeps
Anthropic just shattered the ceiling of AI automation. Claude Code Routines are here to run your workflows in the cloud—for engineers, marketers, and industrial leaders alike.
8 Netlify Alternatives Worth Trying in 2026
The best Netlify alternatives in 2026: Vercel for Next.js, Railway for variable workloads, Coolify for self-hosted cost control, and more. Find the right deployment platform for your stack.
How to Monitor a Linux Server: CPU, Memory, and Disk
Practical guide to Linux server monitoring. Learn to use top, htop, and df to track CPU, memory, and disk usage, and set up persistent alerts for your server.
How to Set Up Coolify for Self-Hosted Deployments
Step-by-step guide to setting up Coolify on your VPS. Learn to deploy Node.js/Docker apps, manage domains, and handle HTTPS for free on your own hardware.
How to Set Up a Reverse Proxy with Nginx
Step-by-step guide to setting up Nginx as a reverse proxy for your web apps. Learn to configure HTTPS, security headers, WebSocket support, and rate limiting.
SSH Config & Aliases: The Developer's Connection Kit
Master SSH configuration — host aliases, jump hosts, key management, port forwarding, and secure connections. Save time with ~/.ssh/config automation.
How to Use Environment Variables in Docker
Manage environment variables in Docker containers and Compose files — inline values, .env files, runtime injection, secrets, and production patterns.
Docker Multi-Stage Builds: Smaller Images, Faster Deploys
Master Docker multi-stage builds — reduce image size, improve security, speed up builds. Production-ready patterns for Node.js, Python, Go, and more.
How to Harden SSH on a Linux Server
Step-by-step SSH hardening guide. Learn to disable root login, enforce SSH keys, change ports, and add 2FA to protect your Linux server from brute-force bots.
Docker Compose Cheat Sheet: Services, Volumes & Production
A complete Docker Compose guide covering service definitions, volumes, networks, and health checks. Includes production-ready templates and CLI commands.
Nginx Cheat Sheet: Config, Routing, SSL & Performance (2026)
Complete Nginx reference for server blocks, location matching, proxy_pass, SSL/TLS, gzip, rate limiting, and production-ready config templates.
jq Cheat Sheet: JSON Filtering, Transformation & CLI Syntax (2026)
Complete jq reference covering JSON formatting, property extraction, array slicing, object construction, conditional filtering, and slurp mode.
How to Install Docker on Ubuntu, macOS and Windows
Step-by-step guide to installing Docker Desktop or Engine on Ubuntu, macOS, and Windows. Learn post-install setup and how to run your first container.
cURL Command-Line Cheat Sheet: HTTP Requests & API Testing (2026)
Complete cURL reference covering GET/POST requests, custom headers, authentication, file downloads, SSL debugging, and HTTP/3 testing.
Tmux Cheat Sheet: Sessions, Panes, Windows & Config (2026)
Complete Tmux reference covering session management, window switching, pane splits, TPM plugin manager, and modern .tmux.conf configurations.
Docker & Docker Compose Cheat Sheet: Images, Containers & CLI (2026)
Complete Docker reference covering Dockerfile syntax, container management, volume persistence, networking, Compose V2, and multi-stage builds.
Linux & Bash Cheat Sheet: Terminal Commands & Scripting (2026)
Complete Linux & Bash reference covering navigation, file manipulation, permissions, processes, networking, cron jobs, SSH, pipes, and shell scripting.
How to Write a Production Dockerfile for Node.js
Build small, fast, production-ready Docker images for Node.js — layer caching, multi-stage builds, non-root user, health checks, and .dockerignore explained.
Docker Compose in Production: Best Practices & Tips
Learn how to run Docker Compose in production securely. This guide covers health checks, restart policies, secrets, logging, and resource limits for deployment.
GitHub Actions Secrets: Best Practices to Secure Credentials
Stop leaking credentials in CI/CD. Learn to store, scope, and manage GitHub Actions secrets correctly while avoiding common pitfalls that expose API keys.
Kubernetes Cheat Sheet: Every kubectl Command You Need (2026)
Complete Kubernetes reference with copy-paste kubectl commands for pods, deployments, services, namespaces, config, scaling, logs, exec, and troubleshooting.
Docker Desktop Was Killing My Laptop. Here Is What Fixed It.
Is Docker Desktop killing your laptop? Fix high RAM usage and fan noise with memory caps, layer caching, and optimized dev images for better performance.
How to Set Up CI/CD with GitHub Actions (Complete Guide)
Learn to build CI/CD pipelines with GitHub Actions. Step-by-step guide to testing, building, and deploying apps with secure secret management.
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