[simonw]

I stand by what I said. Knowing how to eg loop through every file in the current directory in Bash is trivia.

That's not to say it's trivial, or to disparage that knowledge. But it's not at the same level as understanding how eg Unix processes can be piped together.

If I'm interviewing a candidate and they can't remember the syntax for a Bash loop, I don't care. If they can't explain what happens when you pipe output from one process to another (at least at a high level), that's a problem.