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Programming tutorial - IT technology blog

Build a REST API with Node.js and Express: A Production-Ready Guide

March 11, 2026

Learn to build a robust REST API using Node.js and Express with this comprehensive, production-focused tutorial. Covering installation, configuration, testing, and essential monitoring strategies, this guide shares real-world insights for creating stable and maintainable backend services.

Security

SSH Security Best Practices: Key Auth, Fail2Ban, and Port Knocking Explained

March 11, 2026

Discover how to significantly enhance your server's SSH security. This tutorial covers implementing key authentication to replace passwords, using Fail2Ban to combat brute-force attacks, and setting up port knocking for an invisible SSH port, protecting your server from unauthorized access.

Networking

Wireshark: Essential Network Packet Analysis for IT Professionals

March 11, 2026

This tutorial guides IT professionals in using Wireshark for network packet analysis. Learn about installation, effective capture and display filters, and practical troubleshooting techniques to diagnose network and application issues with precision.

Database

Mastering SQL Query Optimization: A Hands-On Guide to Enhancing Database Performance

March 11, 2026

Is your application crawling? Learn to debug and fix slow SQL queries in MySQL and PostgreSQL. This hands-on guide covers EXPLAIN, strategic indexing, and smart query rewriting, ultimately enhancing your database's performance. Keep your applications fast and users satisfied.

Navigating Data Privacy: Critical Risks of AI Tools in the Workplace

March 11, 2026

AI tools boost productivity in daily workflows but bring considerable data privacy risks. This article explores why data leaks occur, compares ways to reduce risk, and presents a multi-faceted approach to protect sensitive information.

Programming

Python Basics for System Administrators: Your Essential Guide

March 11, 2026

Discover how Python can transform your system administration tasks. This guide covers essential Python basics, from installation and first scripts to advanced concepts like modules, file I/O, and subprocess management, all tailored for IT professionals looking to automate and streamline operations.

Security

OWASP Top 10: Understanding and Preventing Common Web Vulnerabilities

March 10, 2026

Dive into the OWASP Top 10, your crucial guide to understanding and preventing common web vulnerabilities. This article offers a beginner-friendly breakdown of critical security risks like Injection and Broken Access Control, complete with practical examples to help junior developers build secure applications.

DevOps

Mastering AWS EC2: Create & Manage Cloud Servers for Production Stability

March 10, 2026

Dive into AWS EC2 with this comprehensive guide. Drawing from six months of production experience, it covers everything from launching your first instance to advanced management, sharing practical tips for stability, cost optimization, and security.

Perplexity AI Explained: The AI-Powered Search Engine for Smarter Research

March 10, 2026

Perplexity AI is an innovative AI-powered search engine that synthesizes information from the web into direct, cited answers. It uses Retrieval-Augmented Generation (RAG) to provide trustworthy results, enhancing research efficiency for IT professionals.

ChatGPT vs Claude vs Gemini: Picking the Right AI for Your IT Projects

March 10, 2026

Navigating the world of AI models like ChatGPT, Claude, and Gemini for IT projects can be challenging. This article compares their strengths, offers practical tips, and helps you decide which AI is the best fit for your specific development and operational needs from a real-world engineering perspective.

GPG for Linux: A Practical Guide to Encrypting Files and Signing Data

Taking Control of Linux PAM: A Practical Guide to System Authentication

Building GraphQL APIs with Python Strawberry and FastAPI: From Schema Design to Authentication

PostgreSQL High Availability on Kubernetes: A Hands-On Guide to CloudNativePG

Beyond ‘Copy-Paste’: Building a Bulletproof 3-2-1 HomeLab Backup with Restic

Stop Flying Blind: Real-Time Linux Server Monitoring with Netdata

GPU-Accelerated Docker: A Production Guide to Installing NVIDIA Container Toolkit on Ubuntu

Implementing Idempotency in Node.js REST APIs with Redis

Kasm Workspaces on Ubuntu: Stream Isolated Desktops to Any Browser

DIY Dynamic DNS with Cloudflare: No More 2 AM Remote Access Failures

Build a REST API with Node.js and Express: A Production-Ready Guide

SSH Security Best Practices: Key Auth, Fail2Ban, and Port Knocking Explained

Wireshark: Essential Network Packet Analysis for IT Professionals

Mastering SQL Query Optimization: A Hands-On Guide to Enhancing Database Performance

Navigating Data Privacy: Critical Risks of AI Tools in the Workplace

Python Basics for System Administrators: Your Essential Guide

OWASP Top 10: Understanding and Preventing Common Web Vulnerabilities

Perplexity AI Explained: The AI-Powered Search Engine for Smarter Research

ChatGPT vs Claude vs Gemini: Picking the Right AI for Your IT Projects