On Sun, Mar 23, 2025 at 9:05 AM Ibsen S Ripsbusker < ibs...@ripsbusker.no.eu.org> wrote:
> First, I would like to know why we have the bin group. Said differently, > how did we decide that some files should belong to bin group rather than > wheel group? As far as I know, this is historical. I found in the Research Unix 6th Edition documentation a statement within the "Setting Up UNIX - Sixth Edition" document this paragraph: | UNIX is now running, and the UNIX Programmer's manual applies; | references below of the form X-Y mean the subsection named X in | section Y of the manual. The `#' is the prompt from the UNIX Shell, | and indicates you are logged in as the super-user. The only valid | user names are `root' and `bin'. The root is the super-user and bin | is the owner of nearly every file in the file system. This was probably true going back to when groups were added to UNIX in 1973 (sometime between 3rd edition and 4th edition). It is definitely true that you can log in to a 5th edition system as the user "bin". I am unsure when the wheel group itself was defined. My guess would be it is from 4.2BSD. I do not have a definitive answer for your second question. -ken
