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by flomo 3471 days ago
UNIX is an open standard with a certification program, and Linux certainly tries to follow the standard.

The only real reason that a Linux distribution hasn't been UNIX-certified is because RedHat and IBM found there was very little marketing value in calling it UNIX, that is, Linux is a stronger brand.

And I suspect the only reason MacOS is UNIX-certified is because they advertised it as "UNIX" and were sued by The Open Group, who owns the trademark. [1]

[1] https://www.cnet.com/news/apple-in-court-dispute-over-unix/

1 comments

K-UX is Linux. It is certified. It's based on Red Hat.