There are a lot of questions that mention
/usr/bin. I think it would be really advantageous to Ask Ubuntu to have a code-processor such that nothing modified or copied to
Installing stuff to
/usr/bin is always a bad idea, and unfortunately it will always "work" right after.
In fact, ideally we would not be targeting
/usr/ outside of
/usr/local at all. The default utilities do it, and every time I see a novice try to be helpful when mentioning these system directories I end up gritting my teeth.