Here is the whole method: get access to a real Linux machine, type commands on it for 30 to 60 minutes every day, and follow a plan that builds from navigating the filesystem up to running your own web server. Do that and you will be comfortable in four weeks and genuinely fluent in about eight. No experience required, no money required. The rest of this article is the specific plan: what to type each week, where to get a free machine you can safely break, what the three scariest errors mean,...