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Programming tutorial - IT technology blog

Build a Static Blog with Hugo or Jekyll: Practical Tips from the Trenches

March 8, 2026

Hugo and Jekyll let you build fast, low-maintenance static blogs without databases or server-side code. This guide walks through practical setup, first posts, deployment to free hosting, and tips to avoid common mistakes.

Networking

How DNS Works: A Complete Guide for Developers and DevOps Engineers

March 7, 2026

DNS is the backbone of every internet connection — invisible until it breaks. This guide walks through how DNS resolution actually works, the key record types every developer should know, and the practical commands that make debugging fast and reliable.

DevOps

Docker Compose: Manage Multi-Container Applications Without Losing Your Mind

March 7, 2026

Managing multi-container applications with individual docker run commands breaks down fast. Docker Compose solves the orchestration problem with a single YAML file — handling networking, startup order, and environment configuration. Here's how we use it in production.

Networking

How to Set Up a DHCP Server on Linux: A Field-Tested Guide

March 7, 2026

A field-tested guide to setting up a DHCP server on Linux using dnsmasq for quick deployments and ISC DHCP for production environments. Covers static leases, multi-subnet config, PXE boot, failover, and monitoring tips learned from six months of real-world use.

Networking

TCP vs UDP: Key Differences and When to Use Each in Your Network Stack

March 7, 2026

TCP guarantees delivery and ordering through a handshake and retransmission; UDP skips all that for raw speed. Knowing when to pick each protocol — and how to verify what your stack is actually doing — is foundational networking knowledge every engineer needs.

Networking

SSH Tunneling: Secure Access to Remote Services Over Any Network

March 7, 2026

SSH tunneling lets you securely forward ports between machines using an existing SSH connection — no VPN, no firewall changes, no extra software. This guide covers local, remote, and dynamic tunnels with practical examples, persistent setup using autossh, and a systemd service for production use.

Networking

Nmap Network Scanning: How to Detect Open Ports and Vulnerabilities Fast

March 7, 2026

Learn how to use Nmap for fast network scanning and vulnerability detection through real-world incident response scenarios. Covers port scanning, service version detection, NSE vulnerability scripts, and a practical scan sequence for sysadmins and security engineers.

DevOps

Docker for Beginners: From Install to Running Your First Container

March 7, 2026

Docker solves the classic "works on my machine" problem by packaging your app and its entire environment into a portable container. This guide walks you through installing Docker, understanding core concepts, building your first custom image, and practical tips for real-world usage.

DevOps

Kubernetes Basics: Pod, Service, and Deployment Explained with Real Examples

March 7, 2026

Kubernetes solves the problem of running containers reliably at scale. This guide breaks down the three core building blocks — Pod, Service, and Deployment — with practical YAML examples and hands-on commands to deploy and manage a real application.

HomeLab

Build a Home Lab with Proxmox VE: A Practical Guide for Beginners

March 6, 2026

Learn how to set up a home lab using Proxmox VE — a free, open-source bare-metal hypervisor. This guide walks you through installation, VM creation, and LXC containers so you can practice real IT skills on cheap hardware without cloud costs.