I printed this pic out and had it on the wall of a guesthouse that I owned for a decade. There was a small sign on the framed picture that said "I'll give a free beer to anyone who can tell me why this is funny - and not a "I googled it" answer"

If someone came to me to tell me what the answer was, i would ask them to use sudo in a sentence, if they didn't immediately list some sort of Linux code, I knew they were lying. In the 10 years i owned that place I only had to give away about 6 free beers - not many people are familiar with Linux, but the ones who were, we had a good chat.