I've been admining Linux systems for 25 years, and I still have to check which one it is every time.
@monsieuricon The one that always gets me is rsync. Do I put a slash on the end of a directory or not? Decades, and I still often either look it up or end up with the wrong thing and have to clean up.
A trailing slash in rsync hides the name before it, so it becomes an anonymous directory and only content counts.
That idea somehow helps me to figure it out.