I changed it. The HN guidelines call for taking linkbait out of titles ("every user should know") and for not having arbitrary numbers in titles—which are also a form of linkbait. Taking those things out as well as the redundancies (terminal/command-line, utilities/users) yields something pretty close to "OS X Command Line Utilities".

I don't see any ambiguity. The article is precisely about OS X Command Line Utilities; it doesn't matter how many there are in the list. Nor is it misleading. There's no implication of completeness.