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Mastering OPTIMIZER_TRACE: The Pro Technique for Dissecting MySQL Index Selection Logic

By IT From Zero September 1, 2026

A guide to using OPTIMIZER_TRACE for deep analysis of MySQL index selection. Resolve SQL performance issues effectively based on actual execution costs.

Development

Go Generics in Practice: From 2 AM Runtime Errors to Clean Microservices Architecture

By IT From Zero August 31, 2026

Discover how to apply Go Generics to optimize Microservices. A detailed guide on Type Parameters, Constraints, and reducing boilerplate by 70% while ensuring Type Safety.

Virtualization

Integrating Proxmox VE with Active Directory: Centralized Management and Professional RBAC

By IT From Zero August 31, 2026

Manage Proxmox users centrally by integrating Active Directory. Detailed instructions on LDAP configuration, group synchronization, and RBAC to optimize system administration.

Virtualization

Optimizing Windows on KVM/Proxmox: Achieve 99% Bare-Metal Performance

By IT From Zero August 31, 2026

Secrets to optimizing Windows VMs on Proxmox for 99% bare-metal performance. A detailed guide on VirtIO SCSI, CPU Host, io_uring, and QEMU Guest Agent based on real-world experience.

Network

Turn SSH into a VPN in 30 Seconds with sshuttle: Fast, Lean, and No Root Required

By IT From Zero August 31, 2026

Learn how to use sshuttle to create an instant VPN over SSH. A perfect OpenVPN alternative for DevOps, supporting full traffic routing and internal DNS without requiring a root server.

Monitoring

Building a Custom Prometheus Exporter with Python: Comprehensive Internal API Monitoring

By IT From Zero August 31, 2026

Is your system down even though the dashboard is green? Learn how to build a Custom Prometheus Exporter with Python to professionally monitor internal APIs and business logic.

Development

Integrating PayOS with Node.js: Clean Webhook Handling to Never Lose an Order

By IT From Zero August 31, 2026

Learn how to professionally integrate PayOS with Node.js: From creating VietQR payment links to secure webhook handling, order deduplication, and real-world debugging tips.

Docker

Dockerizing FastAPI: From ‘Works on My Machine’ to Production-Ready (With Alembic & Multi-stage Builds)

By IT From Zero August 31, 2026

Dockerize FastAPI like a pro: Optimize Multi-stage builds to reduce image size by 80%, integrate Alembic for automatic migrations, and configure Gunicorn for production.

VMware

GPU Sharing over the Network with VMware vSphere Bitfusion: Optimizing Performance and Maximizing Resource Utilization

By IT From Zero August 31, 2026

No more idle GPUs. A detailed guide on installing VMware vSphere Bitfusion to share and partition GPU resources over the network for AI/Deep Learning teams.

Network

Avahi Installation Guide: Automating LAN DNS Without a Central Server

By IT From Zero August 31, 2026

Configure Avahi on Linux to automate device discovery in a LAN via mDNS. A highly efficient alternative to manual DNS for SysAdmins and Developers.

Monitoring Argo CD Application Sync and Health Status with Prometheus and Grafana

Installing and Using Portkey AI Gateway: Rate Limiting, Load Balancing, and Multi-LLM Observability

How to Install and Configure nftables on Linux: A Complete iptables Replacement

Optimizing KVM Networking with virtio-net Multiqueue and vhost-net: Hitting Full 10GbE Without CPU Bottlenecks

How to Deploy Umami Analytics with Docker Compose and PostgreSQL: Self-Host a Lightweight GA4 Alternative

How to Back Up SQLite to S3 with Litestream: Real-Time Production Backups

Guide to Using Tart on macOS Apple Silicon: Create and Manage CLI Virtual Machines for CI/CD

Installing and Configuring Auditd on Ubuntu Server: Tracing User Actions Down to the Kernel Level

How to Use git-credential-oauth: Log in to GitHub and GitLab in Terminal via Browser

How to Enable Virtualization-Based Security (VBS) and Credential Guard on VMware vSphere

Mastering OPTIMIZER_TRACE: The Pro Technique for Dissecting MySQL Index Selection Logic

Go Generics in Practice: From 2 AM Runtime Errors to Clean Microservices Architecture

Integrating Proxmox VE with Active Directory: Centralized Management and Professional RBAC

Optimizing Windows on KVM/Proxmox: Achieve 99% Bare-Metal Performance

Turn SSH into a VPN in 30 Seconds with sshuttle: Fast, Lean, and No Root Required

Building a Custom Prometheus Exporter with Python: Comprehensive Internal API Monitoring

Integrating PayOS with Node.js: Clean Webhook Handling to Never Lose an Order

Dockerizing FastAPI: From ‘Works on My Machine’ to Production-Ready (With Alembic & Multi-stage Builds)

Avahi Installation Guide: Automating LAN DNS Without a Central Server