Obscure command-line invocations, some specialist topic that's not discussed much online. Usually I Google something first and if I can't see any straightforwar

Obscure command-line invocations, some specialist topic that's not discussed much online. Usually I Google something first and if I can't see any straightforward answer in a couple of minutes I'll ask ChatGPT. For example I don't know much about electronics so I asked it how design a circuit for a problem I had and it came up with a useful answer.