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by linuxhiker 2474 days ago
FreeBSD is a 'True' Unix and it is as open as they come.
1 comments
dangerbird2 2474 days ago
From a trademarking stance, the only 'True" unixes are those that pay to get certified by Single UNIX specification. Of those, two are commercial Linux distributions, and the rest (including macOS) are proprietary unix operating systems

https://en.wikipedia.org/wiki/Single_UNIX_Specification#Curr...

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