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NetFlow and IPFIX: Monitoring Network Bandwidth with nfdump and nfsen on Linux

By admin May 26, 2026

Identify the IP consuming 90% of your network bandwidth in just 30 seconds. A detailed guide on deploying nfdump and nfsen for NetFlow/IPFIX monitoring on Linux based on real-world experience.

Ubuntu

Installing Jellyfin on Ubuntu: Build Your Own ‘Personal Netflix’ 100% Free

By admin May 26, 2026

Build your own home media system like Netflix using Jellyfin on Ubuntu. A step-by-step guide from installation to hardware optimization, completely free.

Artificial Intelligence tutorial - IT technology blog

Build Your Own Lightweight Offline TTS System on Linux with Piper and Python

By admin May 26, 2026

Say goodbye to thousand-dollar Cloud TTS bills. Discover how to deploy Piper on Linux for a high-speed, secure, and self-hosted text-to-speech system that runs smoothly even on a Raspberry Pi.

Fedora

Setting Up OpenSSH Server on Fedora: SSH Keys, sshd_config Hardening, and firewalld Integration

By admin May 25, 2026

A practical guide to installing and hardening OpenSSH Server on Fedora: key-based authentication (ED25519), disabling password auth, configuring sshd_config via drop-in files, and integrating firewalld with zone management. The standard workflow for production and development server environments.

Monitoring

Self-Hosting SigNoz with Docker: The Open-Source APM Alternative to Datadog

By admin May 25, 2026

Prometheus + Grafana are great at tracking metrics, but they won't help you correlate traces and logs when debugging. Self-hosted SigNoz solves this by consolidating Metrics, Traces, and Logs into a single interface, built on OpenTelemetry and ClickHouse — completely free, lighter than ELK, and straightforward to deploy with Docker Compose.

Network

How to Deploy a Mesh VPN with Nebula: Securely Connect Thousands of Servers from Slack

By admin May 25, 2026

Nebula is an open-source mesh VPN from Slack that enables peer-to-peer connections between thousands of servers without a relay, encrypted via the Noise Protocol. This guide covers installation, lighthouse configuration, group-based access control, and real-world connectivity testing on Linux.

Virtualization

Apache CloudStack: A Lightweight Private Cloud Alternative to OpenStack

By admin May 25, 2026

Tired of OpenStack's complexity? Discover how to build a Private Cloud with Apache CloudStack—a lightweight, easy-to-manage IaaS solution for enterprises.

Fedora

Mastering Toolbox on Fedora: How to Create Isolated and Professional Dev Environments

By admin May 25, 2026

Toolbox is a solution that helps developers create isolated development environments on Fedora quickly. Learn how to keep your system clean and avoid library conflicts.

Python

Mastering Pydantic v2: Don’t Let ‘Garbage’ Data Ruin Your Python Applications

By admin May 25, 2026

Don't let data errors break your application. This detailed Pydantic v2 guide helps you validate, standardize, and process Python data up to 20x faster with its Rust core.

Docker

Docker Compose Include: A “Divide and Conquer” Strategy for Thousand-Line YAML Files in Microservices

By admin May 25, 2026

Learn how to modularize your docker-compose.yml file using the include feature in Docker Compose V2. This solution helps break down complex microservices projects into manageable components.