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Practical guides on networking, homelabbing, domains, DNS, SQL, Linux, Ubuntu, MySQL & MariaDB, phpMyAdmin, PHP, JavaScript, CSS and more.
Networking
OSI, TCP/IP, subnetting, VLANs, NAT, firewalls, reverse proxies.
Browse All TopicsHomelab
Proxmox, Docker, NAS, backups, UPS, remote access, monitoring.
Browse All TopicsDomains
How domains work, TLDs, ternisdomains.de, WHOIS, transfers, delegation.
Browse All TopicsDNS
Records, DNSSEC, dig/host debugging, authoritative DNS with example-dns.
Browse All TopicsSQL
SELECT, JOINs, indexes, transactions, backups.
Browse All TopicsLinux
Filesystem, permissions, SSH, systemd, logs.
Browse All TopicsLinux Packages
Essential CLI utilities: fail2ban, btop, tmux, certbot, caddy, nginx, curl & screenfetch.
Browse All TopicsUbuntu
APT, UFW, users and sudo on Ubuntu.
Browse All TopicsMySQL & MariaDB
Choosing, installing, users, backups, small-VPS tuning.
Browse All TopicsphpMyAdmin
Install, daily workflows, hardening checklist.
Browse All TopicsPHP
Getting started, forms security, PDO with MySQL.
Browse All TopicsJavaScript
fetch, framework-free DOM, theme-toggle pattern.
Browse All TopicsCSS
Grid vs flexbox, variables & dark mode, responsive basics.
Browse All TopicsSelf-Hosting
Nginx reverse proxy, TLS, Docker Compose patterns.
Browse All TopicsSecurity
Let's Encrypt, TLS, the 3-2-1 backup rule.
Browse All TopicsGit & DevOps
Git crash course, contributing to this wiki.
Browse All TopicsFeatured guides
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OSI and TCP/IP Models — What Every Developer & Sysadmin Should Know
Practical comparison of the 7-layer OSI model and 4-layer TCP/IP model, packet encapsulation, and bottom-up network debugging techniques.
IP Subnetting and CIDR in 10 Minutes — A Practical Guide
Complete beginner guide to IPv4 addresses, CIDR prefix notation, calculating usable hosts, subnet masks, RFC 1918 private ranges, and CLI tools.
NAT and Port Forwarding — A Beginner's Guide to Router Networking
Understand SNAT, DNAT (Port Forwarding), Hairpin NAT loopback, avoiding CGNAT traps, and safely hosting services from a home or office network.
Reverse Proxy Basics — One Front Door for All Web Services
Complete beginner guide to reverse proxies, forward vs reverse proxies, SNI routing, upstream headers (X-Forwarded-For), TLS termination, and choosing between Caddy and Nginx.
Planning Your First Homelab & Rack — Power, Noise, and Hardware Guide
Complete beginner planning guide for homelabs, hardware progression ladder, Intel N100 mini PCs, UPS sizing with NUT, noise control, and structured cabling.
Docker Compose Patterns for the Homelab — Beginner to Pro
Complete beginner guide to organizing self-hosted services with Docker Compose, yaml syntax breakdown, persistent volumes, networking, and safe updates.
Proxmox VE Getting Started — Installation, Storage, VMs, and LXC
Complete beginner guide to Proxmox VE bare-metal virtualization, ZFS vs LVM storage, launching KVM virtual machines, and managing LXC containers via CLI.
Remote Access — Tailscale, WireGuard, and Mesh VPNs vs. Port Forwarding
Complete beginner guide to accessing your homelab securely from anywhere, comparing Tailscale mesh VPN, native WireGuard, CGNAT traversal, and subnet routing.