Effective Shell
For people who think that they're the intended audience of these kinds of guides: do you find them effective?<p>I learned how to use a POSIX shell years before I learned how to program (outside of a shell, that is), and I've often wondered how to help people (particularly younger colleagues) who learned things the other way around.<p>My experience so far is that a lot of people get stuck in an "experience trough," for lack of a better phrase: they're comfortable navigating around the filesystem and running basic commands, but struggle with some of the more powerful building blocks that can make someone a real shell power user (`xargs`, nontrivial uses of `find`, here-strings, subshells and blocks, process substitution, etc.).