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Development tutorial - IT technology blog

Idempotency in REST APIs: Preventing “Double Charges” with Node.js and Redis

By IT From Zero August 7, 2026

Learn how to prevent duplicate transactions in REST APIs using Node.js and Redis. A practical guide to protecting data and avoiding 'double charge' errors during retries.

Monitoring

Mastering WireGuard VPN: Monitoring Bandwidth and Connectivity with Prometheus

By IT From Zero August 7, 2026

Forget manual SSH. This guide helps you professionally monitor WireGuard VPN using Prometheus and Grafana, tracking detailed per-user traffic in real-time.

Monitoring

Monitoring Postfix Mail Server: From ‘In the Dark’ to System Mastery with Prometheus

By IT From Zero August 7, 2026

Stop treating your Mail Server like a 'black box'. Here's a detailed guide on using Prometheus and Postfix Exporter for professional monitoring to prevent queue congestion and blacklisting.

Artificial Intelligence tutorial - IT technology blog

Automating Server Recovery: Building a Self-Healing Linux System with Python and GPT-4o

By IT From Zero August 6, 2026

Build a self-healing Linux system with Python and GPT-4o. Automatically analyze logs, diagnose root causes, and execute commands to restore services quickly.

Monitoring

Monitoring Jenkins Pipelines with Prometheus: From ‘Black Box’ to 5-Star Dashboard

By IT From Zero August 6, 2026

Learn how to monitor Jenkins Pipelines professionally with Prometheus and Grafana. This article shares practical experience on metrics configuration, endpoint security, and alert optimization to avoid alert fatigue.

Development

Container Queries: When Components “Know Where They Are” Instead of Looking at the Screen

By IT From Zero August 6, 2026

It's time to stop relying solely on Media Queries. Container Queries enable components to change their layout based on their actual space, making CSS cleaner and more flexible.

Development

Building Your Own Web Push Notification System with Node.js: ‘Breaking Up’ with Firebase for a Lighter App

By IT From Zero August 6, 2026

Stop relying on Firebase! Discover how to build a lightweight Web Push Notification system for Node.js using the web-push library and VAPID protocol.

Installing Microsoft GraphRAG with Ollama: Build Your Own 100% Local Knowledge Graph

By IT From Zero August 6, 2026

Discover how to set up Microsoft GraphRAG with Ollama to build a 100% offline Knowledge Graph system. The perfect solution for data security and saving on API costs.

Monitoring

Centralized Windows Server Log Management: Stop Manual Log Checking with Grafana Alloy & Loki

By IT From Zero August 5, 2026

Forget manual log checking. This guide helps you push all Windows Event Logs to Grafana Loki using Alloy for centralized monitoring and instant alerts.

Virtualization

Self-Hosting a RustDesk Server: Master Remote Desktop with Blazing-Fast Speed and Absolute Security

By IT From Zero August 5, 2026

A detailed guide on self-hosting a RustDesk Server using Docker. The perfect TeamViewer alternative for faster remote control and total data privacy.

Configuring BFD with FRRouting on Linux: Sub-Second Link Failure Detection for OSPF and BGP

Clean Up Stale Remote-Tracking Branches with git remote prune and git fetch –prune

Implementing Single Sign-On (SSO) with Keycloak and Next.js: A Complete OpenID Connect (OIDC) Guide

Enable MySQL Slow Query Log and Use pt-query-digest to Find Database Bottlenecks

MetaGPT with Python Guide: Automate Software Development with Multi-Agent Systems

Configuring SR-IOV on KVM/Proxmox: Share 10GbE NICs with Near Bare-Metal Performance

Docker Autoheal Guide: Automatically Restart Unhealthy Containers

APScheduler in Python: Production-Ready Background Job Scheduling for Backend

How to Reclaim Storage Space (Space Reclamation / UNMAP) on VMware ESXi

How to Use Bitnami Sealed Secrets on Kubernetes: Secure GitOps Secrets Management

Idempotency in REST APIs: Preventing “Double Charges” with Node.js and Redis

Mastering WireGuard VPN: Monitoring Bandwidth and Connectivity with Prometheus

Monitoring Postfix Mail Server: From ‘In the Dark’ to System Mastery with Prometheus

Automating Server Recovery: Building a Self-Healing Linux System with Python and GPT-4o

Monitoring Jenkins Pipelines with Prometheus: From ‘Black Box’ to 5-Star Dashboard

Container Queries: When Components “Know Where They Are” Instead of Looking at the Screen

Building Your Own Web Push Notification System with Node.js: ‘Breaking Up’ with Firebase for a Lighter App

Installing Microsoft GraphRAG with Ollama: Build Your Own 100% Local Knowledge Graph

Centralized Windows Server Log Management: Stop Manual Log Checking with Grafana Alloy & Loki

Self-Hosting a RustDesk Server: Master Remote Desktop with Blazing-Fast Speed and Absolute Security