ITFROMZERO – Share tobe shared!

How to Install and Configure NFS Server on Fedora: Securely Share Directories on Your Local Network with SELinux and firewalld

By admin July 6, 2026

A guide to installing NFS Server on Fedora from quick start to full detail: configuring /etc/exports, properly opening firewalld, enabling SELinux booleans, and fixing ports so firewall rules survive reboots. Includes instructions for mounting from a client and handling common real-world errors.

Network

Deploying QinQ (Double VLAN 802.1ad) on Linux: Multi-Tenant Traffic Isolation and VLAN Space Expansion

By admin July 6, 2026

QinQ (Double VLAN 802.1ad) expands the VLAN address space to ~16 million and provides fully independent traffic isolation between tenants over a single physical link. This guide covers configuring QinQ on Linux with ip link — from a 5-minute quick start to a production-ready setup with systemd-networkd — along with MTU debugging tips and a real-world intermittent packet loss story.

Virtualization

How to Install and Use Lima on macOS: Create Lightweight Linux VMs with QEMU and VZ Framework as a Free Docker Desktop Alternative

By admin July 6, 2026

Lima is an open-source tool for creating Linux virtual machines on macOS using QEMU or Apple's VZ Framework, replacing Docker Desktop completely for free. This article compares available solutions, walks through Lima installation, Docker integration, and managing multiple VMs from the command line.

MySQL

JSON_TABLE() in MySQL 8: Converting Nested JSON Data into Relational Tables

By admin July 6, 2026

JSON_TABLE() in MySQL 8 converts JSON arrays into relational rows, enabling standard GROUP BY, JOIN, and aggregate operations. This guide compares it with JSON_EXTRACT and application-side processing, analyzes when to use each approach, with real-world examples including NESTED PATH and inconsistent data handling.

Monitoring

Monitoring Traefik Reverse Proxy with Prometheus and Grafana: Tracking Request Rate, Error Rate, and Latency

By admin July 6, 2026

A guide to enabling the Prometheus metrics endpoint on Traefik v3, setting up Docker Compose for the full monitoring stack, and building a Grafana dashboard with PromQL queries to track request rate, error rate, and P95 latency per service. Includes alert rules for automatic notifications when issues arise.

Fedora

Setting Up a Professional Go (Golang) Development Environment on Fedora: SDK Installation, VS Code, and Debugging from Scratch

By admin July 6, 2026

A guide to installing the official Go SDK on Fedora instead of using DNF, configuring VS Code with gopls, and setting up the Delve debugger — including fixes for common ptrace and PATH errors. Get the setup right from day one so you never waste time debugging your environment later.

Git

Managing Dotfiles with Git Bare: The “Pro” Way to Sync Linux/macOS Workspaces

By admin July 6, 2026

Managing dotfiles with Git Bare Repository is the ultimate solution to sync zsh, vim, and tmux lightning-fast without cluttering your Home directory with symlinks.

Centos

Installing and Configuring 389 Directory Server on CentOS Stream 9: Building a Centralized LDAP Server for User Management

By admin July 5, 2026

A step-by-step guide to installing and configuring 389 Directory Server on CentOS Stream 9 — from a 5-minute quick start to TLS, user management via LDIF, sssd integration for Linux clients, and practical operational tips drawn from real server migration experience.

Centos

How to Install and Configure Squid Proxy Server on CentOS Stream 9: Controlling Internet Access for Enterprise Networks with SELinux and firewalld

By admin July 5, 2026

A complete guide to installing and configuring Squid Proxy Server on CentOS Stream 9 to control Internet access in an enterprise internal network. Covers ACL configuration for blocking websites by domain and working hours, handling SELinux policy, opening ports with firewalld, and practical monitoring and debugging commands.

Database

Dragonfly: A Redis Alternative for Systems with Millions of Requests

By admin July 5, 2026

Is single-threaded Redis slowing down your system? Discover Dragonfly - a multi-threaded in-memory database fully compatible with Redis but 25x faster.

Netdisco: Effortless Network Topology Automation and Switch Port Management

Snapshot Testing with Pytest-snapshot: Stop Struggling with Manual Assertions

Say Goodbye to Passwords: Implementing Magic Links with Node.js and Nodemailer

Securing Python Source Code with PyArmor: Effectively Preventing Reverse Engineering and Protecting Intellectual Property

Feature-Sliced Design (FSD): A ‘Divide and Conquer’ Solution for Large-Scale React Projects

Building Professional CLIs with Node.js and Oclif: From Fragmented Scripts to Standardized Tools

Implementing Circuit Breaker in Python: Don’t Let a Faulty API Crash Your Entire System

Deploying FastNetMon: A Lightweight DDoS Detection Solution via NetFlow/sFlow

3 Pro GraphQL Security Tips: Don’t Hand Hackers the Keys to Your Kingdom

Securing Sudo with 2FA: The Final Defense Against Root Hijacking

Deploying QinQ (Double VLAN 802.1ad) on Linux: Multi-Tenant Traffic Isolation and VLAN Space Expansion

How to Install and Use Lima on macOS: Create Lightweight Linux VMs with QEMU and VZ Framework as a Free Docker Desktop Alternative

JSON_TABLE() in MySQL 8: Converting Nested JSON Data into Relational Tables

Monitoring Traefik Reverse Proxy with Prometheus and Grafana: Tracking Request Rate, Error Rate, and Latency

Setting Up a Professional Go (Golang) Development Environment on Fedora: SDK Installation, VS Code, and Debugging from Scratch

Managing Dotfiles with Git Bare: The “Pro” Way to Sync Linux/macOS Workspaces

Installing and Configuring 389 Directory Server on CentOS Stream 9: Building a Centralized LDAP Server for User Management

How to Install and Configure Squid Proxy Server on CentOS Stream 9: Controlling Internet Access for Enterprise Networks with SELinux and firewalld

Dragonfly: A Redis Alternative for Systems with Millions of Requests