ITNotes - Page 33 of 35 - From Terminal to Cloud

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.

Linux

LVM on Linux: Flexible Disk Management Without the Headaches

March 6, 2026

LVM (Logical Volume Manager) lets you resize Linux partitions live, add disks to an existing storage pool, and take point-in-time snapshots — all without downtime. This guide covers PV/VG/LV concepts and the practical commands that matter most in real-world server management.

Linux

How to Troubleshoot ‘Disk Full’ Error and Manage Disk Space on Linux

March 6, 2026

Linux disk full errors can crash your applications instantly. This guide walks through practical commands to diagnose disk usage, recover space fast from logs, Docker, and caches, and set up monitoring to catch problems before they escalate.

Programming

What Is a Webhook? How It Works, Pros & Cons, and Real-World Use Cases

March 6, 2026

Webhooks push events straight to your endpoint the instant something happens — no polling loops, no wasted API calls. After 6 months running webhook integrations in production, this guide covers how they work, honest pros and cons, and a secure implementation pattern with signature verification and idempotency handling.

Networking

IPv4 Subnetting Tutorial: How to Calculate Subnets Without Losing Your Mind

March 6, 2026

IPv4 subnetting is the skill that separates networking theory from practical network engineering. This tutorial walks through subnet calculations, CIDR notation, VLSM, and real-world allocation strategies with Python and Linux command examples.

Programming

PostgreSQL Installation and Basic Operations: A Practical Guide for Junior Developers

March 6, 2026

A step-by-step guide to installing PostgreSQL and performing basic database operations. Covers native installation on Ubuntu, creating databases and tables, CRUD operations in SQL, and connecting from Python — everything a junior developer needs to get started.

AI Content Creation for Blog, Social Media, and Email: A 6-Month Production Review

March 6, 2026

After 6 months of using AI tools across a real content pipeline — blog posts, social media, and email campaigns — here's what actually works, what doesn't, and how to integrate AI as a production content component rather than a novelty.

Prompt Engineering 101: How to Write Effective Prompts That Actually Work

March 6, 2026

A seven-word system prompt brought down our AI support bot at 3 AM — and the model was working perfectly. This guide covers the prompt engineering fundamentals that prevent production failures: role assignment, output format specification, few-shot examples, chain-of-thought reasoning, and how to build a proper test suite for your prompts.

DevOps

Ansible Server Configuration Automation: 6 Months of Production Reality

March 6, 2026

After six months running Ansible in production across multiple Ubuntu servers, here's an honest comparison against Puppet, Chef, and manual scripts — including real pros and cons, recommended project structure, and a working playbook to get started immediately.

Linux

Linux chmod and chown: What 3 Years of Managing 10+ VPS Taught Me About Permissions

March 6, 2026

After managing 10+ Linux VPS instances over 3 years, I've seen sysadmins take two very different approaches to chmod and chown — and only one holds up under pressure. Here's the full breakdown: what works, what backfires, and the exact permission model I apply to every new server.

GPG for Linux: A Practical Guide to Encrypting Files and Signing Data

Taking Control of Linux PAM: A Practical Guide to System Authentication

Building GraphQL APIs with Python Strawberry and FastAPI: From Schema Design to Authentication

PostgreSQL High Availability on Kubernetes: A Hands-On Guide to CloudNativePG

Beyond ‘Copy-Paste’: Building a Bulletproof 3-2-1 HomeLab Backup with Restic

Stop Flying Blind: Real-Time Linux Server Monitoring with Netdata

GPU-Accelerated Docker: A Production Guide to Installing NVIDIA Container Toolkit on Ubuntu

Implementing Idempotency in Node.js REST APIs with Redis

Kasm Workspaces on Ubuntu: Stream Isolated Desktops to Any Browser

DIY Dynamic DNS with Cloudflare: No More 2 AM Remote Access Failures

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

LVM on Linux: Flexible Disk Management Without the Headaches

How to Troubleshoot ‘Disk Full’ Error and Manage Disk Space on Linux

What Is a Webhook? How It Works, Pros & Cons, and Real-World Use Cases

IPv4 Subnetting Tutorial: How to Calculate Subnets Without Losing Your Mind

PostgreSQL Installation and Basic Operations: A Practical Guide for Junior Developers

AI Content Creation for Blog, Social Media, and Email: A 6-Month Production Review

Prompt Engineering 101: How to Write Effective Prompts That Actually Work

Ansible Server Configuration Automation: 6 Months of Production Reality

Linux chmod and chown: What 3 Years of Managing 10+ VPS Taught Me About Permissions