tutorial - ITNotes

Mastering PostgreSQL: Installation and Essential CRUD Operations for Developers

March 13, 2026

Master the fundamentals of PostgreSQL. This guide walks you through installation and essential CRUD operations (Create, Read, Update, Delete) with practical, beginner-friendly examples.

Linux

Systemd & Systemctl: Essential Guide to Managing Services on Modern Linux

March 12, 2026

Mastering Systemd and Systemctl is crucial for any Linux engineer facing critical service outages. This tutorial demystifies service management on modern Linux, providing practical commands and a step-by-step guide to creating your own custom services. Equip yourself with the knowledge to troubleshoot effectively and maintain system stability.

Google Gemini API Tutorial: Build AI Features Into Your App in 30 Minutes

March 5, 2026

A practical tutorial showing junior developers how to use the Google Gemini API with Python — covering text generation, image analysis, streaming, and multi-turn chat with real working code examples.

Build a Python Chatbot with OpenAI API: From Zero to Production

March 5, 2026

A practical guide to building a Python chatbot with the OpenAI API — conversation history, streaming, retry logic, and production hardening. Working prototype in 5 minutes.