From the signal in the cable
to running a store server
An introduction to networks for the person who has just been handed an e-commerce server — analogies instead of jargon, and typing the commands yourself instead of only reading about them.
A whole virtual Ubuntu server is assigned to you. Nothing you do to it can go wrong.
How you'll learn
An IP address is a street address, a port is a flat number, a proxy is the front desk. Unfamiliar ideas are explained in terms of things you already know.
Every command has a run button. It all runs on the virtual server that is yours alone, so break it as much as you like.
Block yourself with the firewall, cause a 502, delete the DNS record. You have to live through a fault before you can fix one.
You learn the routine that takes you from “the site won't open” to the culprit in five minutes.