#DevOps.
DevOps tutorials covering culture, practices, and tools for building, testing, and deploying software efficiently.
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.
jq Cheat Sheet: Filter, Transform, and Query JSON from the Terminal
Complete jq reference — basic filters, pipes, array/object operations, conditionals, string interpolation, select, map, reduce, and real DevOps workflows.
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: Routing, SSL & Performance Guide
Complete Nginx reference for server blocks, location matching, and proxy_pass. Optimize SSL/TLS, rate limiting, and use our production-ready config template.
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.
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.
Docker Cheat Sheet: Images, Containers, Compose & More
Complete Docker reference — pulling images, running containers, volumes, networks, exec, logs, Docker Compose commands, Dockerfile tips, and disk cleanup.
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 Actually Need
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.