ITNotes - Page 82 of 119 - From Terminal to Cloud

Programming tutorial - IT technology blog

Mastering Mocking and Stubbing in Vitest: A TypeScript Guide for Complex Dependencies

April 21, 2026

Learn how to master Vitest mocking and stubbing in TypeScript. Isolate your unit tests from external APIs and databases to build a faster, more reliable development workflow.

Programming

Making Node.js Apps Resilient: A Practical Guide to Retries and Exponential Backoff

April 20, 2026

API failures are inevitable. Learn how to handle them gracefully in Node.js using exponential backoff, jitter, and smart retry logic to improve system reliability.

Building Autonomous Python Agents with the Claude SDK

April 20, 2026

Transform your AI from a passive chatbot into an active agent. This guide shows you how to use the Claude SDK to handle tool calling, state management, and complex Python workflows.

HomeLab

Ditch the Spreadsheets: Professional HomeLab Asset Tracking with Snipe-IT and Docker

April 20, 2026

Ditch the messy spreadsheets. This guide shows you how to deploy Snipe-IT on Docker to track hardware, components, and warranties like a professional sysadmin.

DevOps

Automating Database Schema Changes with Atlas and GitHub Actions: A GitOps Guide

April 20, 2026

Tired of manual SQL migrations breaking your production environment? Learn how to automate database schema changes using Atlas and GitHub Actions in this step-by-step GitOps guide.

Database

PostgreSQL Multi-tenancy: Choosing Between Schemas and RLS for Your SaaS

April 20, 2026

How do you ensure data isolation in a SaaS app? We compare PostgreSQL Schema-based isolation and Row-Level Security (RLS) with concrete examples and performance tips.

Database

Beyond Basic Queries: Mastering SQL Window Functions for Real-World Analytics

April 20, 2026

Upgrade your SQL skills beyond basic joins. Discover how Window Functions like RANK, LAG, and rolling averages can transform your data analysis and make your reports run 10x faster.

Networking

Stop Flying Blind: Mastering Network Visibility with LibreNMS and SNMP

April 20, 2026

Tired of guessing why the network is slow? This practical guide walks you through deploying LibreNMS and SNMP to gain total visibility into your switches, routers, and servers.

Networking

Build a Secure Enterprise WiFi with WPA3 and 802.1X on Linux: A hostapd and VLAN Guide

April 20, 2026

Ditch shared WiFi passwords for good. This guide walks you through setting up WPA3-Enterprise and 802.1X on Linux using hostapd and FreeRADIUS for secure, individual user logins and VLAN isolation.

Database

Stop Over-Engineering: High-Performance PostgreSQL Search without Elasticsearch

April 20, 2026

Is Elasticsearch overkill for your app? Learn how we achieved sub-100ms search on 1.2M rows using PostgreSQL's native GIN indexes and tsvector.

Speed Up Python with Numba JIT: Make Heavy Data Processing 100x Faster

CDK for Terraform (CDKTF) with Python: Deploy Cloud Resources Without Writing HCL

Clean Up Your Java Code: A Practical Guide to Vavr

Stop Deploying Broken Docker Images: A Guide to Container Structure Tests

Mastering Golang Memory Profiling: A Practical Guide with pprof

Stop Storing Secrets in Git: A Guide to 1Password Connect on Kubernetes

Building a Network Performance Testbed: High-Speed Testing with TRex on Linux

Stop Writing Boilerplate: A Guide to Python Dataclasses, Attrs, and Pydantic

Build Your Own Private 5G Network: A Hands-On Guide with Open5GS and srsRAN

Mastering Socket.IO in Node.js: Building Secure, Production-Ready Real-Time Apps

Mastering Mocking and Stubbing in Vitest: A TypeScript Guide for Complex Dependencies

Making Node.js Apps Resilient: A Practical Guide to Retries and Exponential Backoff

Building Autonomous Python Agents with the Claude SDK

Ditch the Spreadsheets: Professional HomeLab Asset Tracking with Snipe-IT and Docker

Automating Database Schema Changes with Atlas and GitHub Actions: A GitOps Guide

PostgreSQL Multi-tenancy: Choosing Between Schemas and RLS for Your SaaS

Beyond Basic Queries: Mastering SQL Window Functions for Real-World Analytics

Stop Flying Blind: Mastering Network Visibility with LibreNMS and SNMP

Build a Secure Enterprise WiFi with WPA3 and 802.1X on Linux: A hostapd and VLAN Guide

Stop Over-Engineering: High-Performance PostgreSQL Search without Elasticsearch