[wlug] Different answers when trying to learn file numbers

Thanks both to Oliver and to Aristotle for taking the trouble to reply to my query. I'll have to take Aristotle's word that the difference between my second and third results, as implied by Oliver, was caused by /proc and /sys "files", since I don't know how to act on Oliver's suggestion to exclude those "directories" from my command. I printed out and tried to read the entire man page for "find", but that didn't overcome my ignorance. Thanks again, Leslie