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Practical infrastructure and development guides

Build, Deploy, and Troubleshoot Modern Systems

Command-driven tutorials for Linux, containers, Kubernetes, backend development, web standards, security, and production operations.

Browse latest tutorials
$ kubectl get pods -A
$ docker compose up -d
$ php -v
$ node --version
$ python --version
Learning paths

Explore tutorial series

Do

Docker

Practical Docker tutorials covering installation, container lifecycle, images, Dockerfiles, storage, networking, security, troubleshooting, and production operations.

  • Docker Security Hardening: Least Privilege, Read-Only Containers, and Rootless Mode
  • Docker Volumes and Bind Mounts: Persistence, Backup, and Restore
  • Docker Networking Explained: Bridge Networks, DNS, and Published Ports
  • Docker Compose Tutorial: Build a Web and Redis Stack from Scratch
Ku

Kubernetes

Practical Kubernetes tutorials covering cluster installation, workloads, networking, storage, scaling, security, and operations.

  • Calico Failed to Create Pod Sandbox: Kubernetes API 10.96.0.1:443 Timeout
  • Kubernetes Troubleshooting: CrashLoopBackOff, Pending Pods, DNS, and ImagePullBackOff
  • Kubernetes Resource Requests, Limits, and Health Probes
  • How to Configure Horizontal Pod Autoscaling with Metrics Server
No

Node.js

Hands-on Node.js tutorials for backend development, testing, security, containers, Linux, and Kubernetes.

  • How to Profile and Optimize Node.js Performance with Worker Threads
  • How to Run a Node.js Application as a systemd Service
  • How to Deploy Node.js Behind Nginx with HTTPS
  • How to Dockerize a Node.js Application with a Multi-Stage Build
Py

Python

Practical Python tutorials for development, automation, testing and deployment.

  • How to Run Python, PostgreSQL, and Redis with Docker Compose
  • How to Deploy a Python FastAPI Application to Kubernetes
  • How to Profile and Optimize Python Application Performance
  • How to Automate Python Scripts with cron and systemd Timers
HT

HTML

Original HTML tutorials covering documents, forms, graphics, media, browser APIs, accessibility, examples, and references.

  • HTML Language Codes and BCP 47 Tags
  • HTTP Status Messages for Front-End Developers
  • HTTP Methods: GET, POST, PUT, PATCH, and DELETE
  • PX to EM Conversion and Accessible CSS Sizing
PH

PHP

Practical PHP 8.3 tutorials for language fundamentals, web development, security, databases, testing, and deployment.

  • How to Deploy PHP-FPM Behind Nginx with HTTPS
  • How to Dockerize PHP-FPM with a Multi-Stage Build
  • Run PHP, Nginx, MySQL, and Redis with Docker Compose
  • Deploy a PHP Application to Kubernetes
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Recently published

Latest tutorials

Install Java 25 on Ubuntu 24.04 using OpenJDK packages

How to Install Java 25 on Ubuntu 24.04

Install OpenJDK 25 on Ubuntu 24.04, configure JAVA_HOME, select the default JDK, and compile and run a complete Java program.

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OpenClaw personal AI assistant gateway connecting models, tools, files, and chat channels

What Is OpenClaw? A Complete Guide to the Open-Source Personal AI Assistant

What is OpenClaw? Learn how this open-source personal AI assistant works, what it can do, how to install it, and what security…

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PHP 8.5 web development and deployment tutorial series

Deploy a PHP Application to Kubernetes

A practical PHP Kubernetes tutorial for PHP 8.3 with runnable code, verification steps, troubleshooting, security guidance, and production best practices.

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PHP 8.5 web development and deployment tutorial series

Run PHP, Nginx, MySQL, and Redis with Docker Compose

A practical PHP Docker Compose tutorial for PHP 8.3 with runnable code, verification steps, troubleshooting, security guidance, and production best practices.

Read tutorial →
PHP 8.5 web development and deployment tutorial series

How to Dockerize PHP-FPM with a Multi-Stage Build

A practical PHP Docker tutorial for PHP 8.3 with runnable code, verification steps, troubleshooting, security guidance, and production best practices.

Read tutorial →
PHP 8.5 web development and deployment tutorial series

How to Deploy PHP-FPM Behind Nginx with HTTPS

A practical PHP Nginx deployment tutorial for PHP 8.3 with runnable code, verification steps, troubleshooting, security guidance, and production best practices.

Read tutorial →
PHP 8.5 web development and deployment tutorial series

How to Configure PHP-FPM 8.3 for Production

A practical PHP-FPM tutorial for PHP 8.3 with runnable code, verification steps, troubleshooting, security guidance, and production best practices.

Read tutorial →
PHP 8.5 web development and deployment tutorial series

PHP Code Quality with PHPStan, PHP-CS-Fixer, and Composer Audit

A practical PHP code quality tutorial for PHP 8.3 with runnable code, verification steps, troubleshooting, security guidance, and production best practices.

Read tutorial →
PHP 8.5 web development and deployment tutorial series

How to Test PHP Applications with PHPUnit

A practical PHP testing tutorial for PHP 8.3 with runnable code, verification steps, troubleshooting, security guidance, and production best practices.

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PHP 8.5 web development and deployment tutorial series

Database Migrations and Seed Data in PHP Projects

A practical PHP database migrations tutorial for PHP 8.3 with runnable code, verification steps, troubleshooting, security guidance, and production best practices.

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PHP 8.5 web development and deployment tutorial series

PHP PDO Transactions, Isolation, and Error Handling

A practical PHP database transactions tutorial for PHP 8.3 with runnable code, verification steps, troubleshooting, security guidance, and production best practices.

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PHP 8.5 web development and deployment tutorial series

Connect PHP to MySQL Securely with PDO

A practical PHP PDO tutorial for PHP 8.3 with runnable code, verification steps, troubleshooting, security guidance, and production best practices.

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PHP 8.5 web development and deployment tutorial series

PHP Security: XSS, SQL Injection, CSRF, SSRF, and Headers

A practical PHP security tutorial for PHP 8.3 with runnable code, verification steps, troubleshooting, security guidance, and production best practices.

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PHP 8.5 web development and deployment tutorial series

PHP File Uploads: Validation, Limits, and Private Storage

A practical PHP file uploads tutorial for PHP 8.3 with runnable code, verification steps, troubleshooting, security guidance, and production best practices.

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PHP 8.5 web development and deployment tutorial series

Build a JSON REST API with Native PHP

A practical PHP REST API tutorial for PHP 8.3 with runnable code, verification steps, troubleshooting, security guidance, and production best practices.

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PHP 8.5 web development and deployment tutorial series

Password Hashing and Authentication in PHP

A practical PHP authentication tutorial for PHP 8.3 with runnable code, verification steps, troubleshooting, security guidance, and production best practices.

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PHP 8.5 web development and deployment tutorial series

PHP Sessions, Secure Cookies, and CSRF Protection

A practical PHP session security tutorial for PHP 8.3 with runnable code, verification steps, troubleshooting, security guidance, and production best practices.

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PHP 8.5 web development and deployment tutorial series

Build and Validate Secure HTML Forms with PHP

A practical PHP forms tutorial for PHP 8.3 with runnable code, verification steps, troubleshooting, security guidance, and production best practices.

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PHP 8.5 web development and deployment tutorial series

How PHP Handles HTTP Requests, Headers, Cookies, and Responses

A practical PHP HTTP tutorial for PHP 8.3 with runnable code, verification steps, troubleshooting, security guidance, and production best practices.

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PHP 8.5 web development and deployment tutorial series

Build a Layered PHP Application with Dependency Injection

A practical PHP application architecture tutorial for PHP 8.3 with runnable code, verification steps, troubleshooting, security guidance, and production best practices.

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PHP 8.5 web development and deployment tutorial series

Composer Tutorial: Dependencies, Lockfiles, Scripts, and Audit

A practical Composer dependency management tutorial for PHP 8.3 with runnable code, verification steps, troubleshooting, security guidance, and production best practices.

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PHP 8.5 web development and deployment tutorial series

How to Install Composer Securely on Ubuntu

A practical Composer installation tutorial for PHP 8.3 with runnable code, verification steps, troubleshooting, security guidance, and production best practices.

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PHP 8.5 web development and deployment tutorial series

PHP Namespaces and PSR-4 Autoloading Explained

A practical Composer autoloading tutorial for PHP 8.3 with runnable code, verification steps, troubleshooting, security guidance, and production best practices.

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PHP 8.5 web development and deployment tutorial series

PHP Interfaces, Abstract Classes, Traits, and Composition

A practical PHP architecture tutorial for PHP 8.3 with runnable code, verification steps, troubleshooting, security guidance, and production best practices.

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Commands you can run. Results you can verify.

Implementation, checks, troubleshooting, and rollback considerations in every guide.

Choose a tutorial
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