I just confirmed this and you are absolutely right, thanks for correcting me. Don't know what drove me there, let's just say: I, unintentionally, always worked with lower case letters and thus, never ran into a situation where an issue appeared. I never noticed that up until now. (The game forces you to use lower and upper case, though.)

Thanks again, I will adjust my message accordingly and apologize for my non-sensical way of spreading info without doing proper checks in advance.

You see, I almost never use tab completion, because I'm thinking to myself that typing commands completely will help me memorize them in the long run. Does it work? Hell if I know!
But thanks for your understanding. And I had to look up 'camel case'. I know this practice for a long time, but I didn't know you had a term for it.

Regarding Hacknet:
The game keeps growing on me, I play it a short amount of time every evening. Kind of substitute for a daily crossword puzzle or a sudoku. At first I was reluctant to buy/play it because of its focus an delivering some kind of story, but it works much better than I expected.
Also I liked part of the mantra of the Entropy hacker group within Hacknet:
Never have an excuse not to improve.