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Virtualization tutorial - IT technology blog

Vagrant + KVM/Libvirt: How to Double Your VM Speed on Linux

By IT From Zero July 22, 2026

Don't let VirtualBox slow down your development on Linux. Switch to KVM/Libvirt to enjoy native performance, 15-second VM boots, and better system resource efficiency.

Git

Gitolite: Ultra-lightweight Git Server Management for 1GB RAM VPS

By IT From Zero July 22, 2026

Forget heavy GitLab instances. Gitolite is an ultra-lightweight, secure, and powerful Git server management solution for small teams using low-spec VPS.

Python

MongoDB + Python: From Basic CRUD to Advanced Aggregation with PyMongo

By IT From Zero July 22, 2026

Learn how to connect Python with MongoDB efficiently. This guide covers optimizing CRUD with insert_many, using Aggregation Pipelines, and indexing techniques for big data.

Git

Guide to Using git-sizer: “Rescuing” Bloated and Sluggish Git Repositories

By IT From Zero July 22, 2026

Is a bloated Git repo slowing down your team? Learn how to use git-sizer to find junk files, massive blobs, and the most effective ways to optimize Git history.

Python

Process Python Data Like a Pro with Counter, defaultdict, and deque

By IT From Zero July 22, 2026

Optimize Python performance by replacing manual loops with Counter, defaultdict, and deque. A solution for cleaner code and faster large-scale data processing.

VMware

VMware vSphere NIOC Configuration Guide: Eliminating Noisy Neighbors and Optimizing Bandwidth

By IT From Zero July 22, 2026

Don't let vMotion or backups clog your application network. Learn how to configure VMware NIOC to prioritize bandwidth and resolve Noisy Neighbor issues on vSphere Distributed Switches.

Database

Deploying Metabase with Docker: A Self-Service BI Solution to Replace Manual Data Extraction

By IT From Zero July 22, 2026

Stop wasting time on manual data extraction. This detailed guide shows you how to set up Metabase with Docker to build a professional, secure, and high-performance BI system for your business.

Fedora

Packaging Linux Applications: A Complete Guide to flatpak-builder on Fedora

By IT From Zero July 22, 2026

Learn to package Linux applications professionally using flatpak-builder on Fedora. A detailed guide covering manifests, sandbox configuration, and Flathub submission.

MySQL

MySQL 9.0 and VECTOR: Embedding Storage Solution for AI Apps Without a Secondary DB

By IT From Zero July 22, 2026

MySQL 9.0 officially supports the VECTOR data type. Learn how to store AI embeddings, calculate Cosine distance, and build efficient semantic search systems directly in MySQL.

Development

Building a Full-Stack App with Nuxt 3: Server Routes, Nitro Engine, and Drizzle ORM

By IT From Zero July 21, 2026

A hands-on guide to building a full-stack application with Nuxt 3, Nitro Engine, and Drizzle ORM — setting up API routes, a type-safe database, and connecting the frontend in a single project. Lessons learned after 6 months in production.

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

Vagrant + KVM/Libvirt: How to Double Your VM Speed on Linux

Gitolite: Ultra-lightweight Git Server Management for 1GB RAM VPS

MongoDB + Python: From Basic CRUD to Advanced Aggregation with PyMongo

Guide to Using git-sizer: “Rescuing” Bloated and Sluggish Git Repositories

Process Python Data Like a Pro with Counter, defaultdict, and deque

VMware vSphere NIOC Configuration Guide: Eliminating Noisy Neighbors and Optimizing Bandwidth

Deploying Metabase with Docker: A Self-Service BI Solution to Replace Manual Data Extraction

Packaging Linux Applications: A Complete Guide to flatpak-builder on Fedora

MySQL 9.0 and VECTOR: Embedding Storage Solution for AI Apps Without a Secondary DB

Building a Full-Stack App with Nuxt 3: Server Routes, Nitro Engine, and Drizzle ORM