This article would have someone believe Common Lisp is any other UNIX language, where near-meaningless UNIX configuration and other things abound. It indents the Lisp in an odd fashion, with closing parentheses on their own lines, and it doesn't mention the REPL but in one paragraph.
As for Steve Losh's article, I don't recommend that one either; it recommends using a Discord server; it recommends using C libraries; it discusses performance and representation characteristics that are allowed, but not required, in interfacing with things such as graphics cards; and it has other characteristics that I don't believe someone new to Common Lisp would recognize it, so I don't recommend that article to novice Common Lispers.