[vanilla]

I can't follow the comparison.

Linux is just a Kernel, most distros use the coreutils package which is developed/maintained by GNU [1].

So any comparison is not between Linux and Unix, rather the GNU part in GNU/Linux

[1]: https://www.gnu.org/software/coreutils/coreutils.html

[justizin]

Right, and OS X is based on FreeBSD.