ITFROMZERO - Share tobe shared! -

How to Configure Port Mirroring on a vSphere Distributed Switch to Capture Packets with Wireshark

By IT From Zero October 17, 2026

Troubleshooting intermittent VM network issues when local tools are restricted? Learn how to configure Port Mirroring on a VMware vSphere Distributed Switch to capture and analyze traffic safely with Wireshark.

Database

How to Install and Configure pgRouting on PostgreSQL: Build Your Own Shortest Path Routing Engine

By IT From Zero October 17, 2026

A hands-on guide to resolving logistics dispatch bottlenecks: installing pgRouting on PostgreSQL, building graph topologies, and computing optimal shortest paths.

MySQL

A Guide to Database Sharding for MySQL with Apache ShardingSphere: A Horizontal Scaling Solution

By IT From Zero October 17, 2026

Is MySQL hitting 45M rows, saturating disk I/O, and freezing production? Learn how to deploy Apache ShardingSphere-Proxy to shard horizontally, optimize routing, and avoid common performance traps.

Ubuntu

A Practical Guide to Configuring and Managing AppArmor on Ubuntu: Application Security and Isolation

By IT From Zero October 17, 2026

Comprehensive guide to configuring AppArmor on Ubuntu. Harden Nginx and MySQL, prevent privilege escalation, and isolate services with minimal resource overhead.

Centos

How to Install and Configure Caddy Web Server on CentOS Stream 9: Automated SSL/TLS and Performance Optimization

By IT From Zero October 17, 2026

Field-tested insights after running Caddy Web Server on production CentOS Stream 9 for six months. Say goodbye to expired SSL panics and bloated Nginx configs.

Centos

How to Install and Configure Nextcloud on CentOS Stream 9: Build Your Own Private Cloud

By IT From Zero October 17, 2026

A cost comparison between Public Cloud, NAS, and Private Cloud, featuring a step-by-step guide to installing Nextcloud on CentOS Stream 9 with Apache, MariaDB, and PHP 8.2.

MySQL

A Guide to Using Multi-Valued Indexes in MySQL 8: Optimizing JSON Array Queries

By IT From Zero October 17, 2026

Real-world experience optimizing JSON array queries in MySQL 8 using Multi-Valued Indexes, slashing query times from 1.8s down to 2ms across tables with over 10 million rows.

Network

How to Install AdGuard Home on Linux: Block Ads Network-Wide and Secure Your Home Network

By IT From Zero October 17, 2026

A complete guide to installing AdGuard Home on Linux. Learn how to resolve systemd-resolved port 53 conflicts, set up encrypted upstream DoH/DoT, and secure your home network.

Python

ChromaDB Python Guide: Build Production-Ready Semantic Search with Vector Embeddings

By IT From Zero October 17, 2026

Is your traditional database overloaded with text searches? Learn how to configure ChromaDB with PersistentClient in Python, resolve SQLite issues, and build production-ready multilingual semantic search.

Virtualization

Configuring Open vSwitch on Proxmox VE: Bridges, Bonds, and GRE Tunnels

By IT From Zero October 17, 2026

Troubleshoot Proxmox VE networking with Open vSwitch: quickly deploy emergency OVS Bridges, aggregate fault-tolerant 10GbE links with LACP Bonds, and connect cross-node VMs via GRE Tunnels.