I purposely avoided POSIX and the UNIX (all caps) trademark because that'll take us in a completely new direction.
Yes, "Linux aims to be compliant, but as certification is expensive, no Linux distribution has been registered as SUS compliant". In fact in the early days, Linus was looking for to borrow the POSIX specification!
And then there was this tragedy, the http://en.wikipedia.org/wiki/SCO-Linux_controversies, Linus mentions in his Aalto Talk (link in the first post). "cost people huge amount of time". I'm not inclined to spend even more time on that, just want to repeat (from memory) a half joke RMS cracked in a talk in Lausanne: "Linux wasn't allowed to call itself a unix, now we allow them to say 'Unix is Linux' - if they wish!".
Is Linux Unix?
This discussion has been locked because a year has elapsed since the last post. Please start a new discussion topic.