Practical homelab builds for infrastructure engineers. This is where enterprise skills meet kit you can actually afford. Guides cover mini PC clusters, refurbished Dell and HPE servers, Proxmox hypervisor setups, network segmentation with VLANs, and the power and cooling tradeoffs that matter when you run 24/7 at home. Every build documented here has either sat in a production rack or a real spare bedroom. No theoretical gear lists, no affiliate filler. If you want to learn Kubernetes on a £120 refurbished OptiPlex or run a dozen self-hosted services on a Pi cluster, start here. The homelab is a professional development environment, and this is how we treat it.
Twenty common SSH errors on Ubuntu with diagnoses and fixes. Connection refused, permission denied, host key verification failed, and the rest. Listicle referen
20 Common SSH Errors on Ubuntu (and How to Fix Each One) Read More »
SSH tunneling on Ubuntu explained with worked examples. Local forwards (-L), remote forwards (-R), dynamic SOCKS proxies (-D), and when each is the right tool.
SSH Tunneling Explained: Local, Remote, and Dynamic Forwards Read More »
Transfer files over SSH on Ubuntu using SCP, SFTP, and rsync. Worked examples for upload, download, recursive copies, preserving permissions, and when to use wh
SCP and SFTP on Ubuntu: Transfer Files Over SSH (with Examples) Read More »
Install and configure fail2ban for SSH on Ubuntu. Default jail config, custom ban times, whitelisting your own IP, and how to unban yourself when you inevitably
Fail2ban for SSH on Ubuntu: Setup, Tuning, and the Lockout Trap Read More »
Eight SSH server settings that close the brute-force vector. Disable password auth, restrict users, change the port, set MaxAuthTries, and more. Tested on Ubunt
SSH Server Hardening: 8 Settings That Stop Brute-Force Logins Read More »
Generate, install and use SSH keys on Ubuntu. Covers Ed25519 vs RSA, key permissions, ssh-copy-id, the authorized_keys file, and the agent.
How to Set Up SSH Key Authentication on Ubuntu (Keygen to Login) Read More »
Three reliable methods to enable SSH on Raspberry Pi. Works on Pi 4, Pi 5, Pi Zero, all Pi OS versions. Includes the headless boot-partition method for setups w
How to Enable SSH on Raspberry Pi: 3 Methods (Pi 4, Pi 5, Headless) Read More »
Step-by-step SSH setup for Ubuntu Server. Covers 22.04, 24.04, and 26.04, including the systemd socket activation change in 24.04 that breaks most older tutorials.
Enable SSH on Ubuntu Server: Complete Setup Guide (22.04, 24.04, 26.04) Read More »
You have inherited a server, taken over a project, or just need to audit who has access. The first question: who has an account on this machine? Linux stores user information in a few well-defined places. Once you know where to look, listing users, checking their groups, and managing accounts becomes straightforward. Real command output
How to List Users in Linux (and Manage User Accounts) Read More »
You have just SSH’d into a server and need to know what you are working with. Is it Ubuntu 22.04? Debian 12? CentOS Stream 9? The commands are simple but there are several options, and each reveals different information. This guide covers five methods to check your Linux distribution and version. All work over SSH,
How to Check Your Ubuntu and Linux Version (5 Quick Methods) Read More »
