On Sat, Jun 12, 2004 at 10:06:49AM +0200, Grauwmans Steven wrote: > Linux is UNIX, but why is Fedora Core a Linux and FreeBSD a UNIX? > I searched on the internet for an answer, but after visiting 10 sites I > gave up. > If U could please help me, I'm getting confused.
Because FreeBSD code is derived from the 4.4 BSD release by the CSRG at Berkeley, and they developed their code based on Unix code from AT&T who were the original authors of Unix. Linux on the otherhand was a cleanroom implementation of a unix-like operating system not incorporating any code from previous Unix systems. (Despite what SCO is claiming, which IMHO is a load of tosh). Mind you, there has been significant cross fertilization between Linux, the BSD and SysV Unix camps. I tend to think that Linux passes the duck test as far as being a Unix variant, and that it should be known as such. I also think that the unix vs Unix(TM) distinction -- i.e. whether the OS has licensed code from AT&T or it's heirs -- is pretty much irrelevant nowadays. For more detail that you could possibly want about the descent of Unix, see: http://www.levenez.com/unix/ (Very much up-to-date, that site -- already mentions FreeBSD 4.10.) Cheers, Matthew -- Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks Savill Way PGP: http://www.infracaninophile.co.uk/pgpkey Marlow Tel: +44 1628 476614 Bucks., SL7 1TH UK
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