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That causality seems backwards. Linux "benefitted" because it was the target of the lawsuit in the first place, which wouldn't have been aimed at Linux had Linux not already been the market winner. It was the USL v. BSDI lawsuit of a decade earlier (which to be clear absolutely did involve copied Unix code) that effectively killed BSD in the market by holding it back as Linux left the launchpad.

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The Linux and BSD cases actually turned out to be pretty similar. There were a handful of cases of literal copying but not to anything close to the degree claimed and pretty much trivial. (And SCO also made all sorts of claims around Linux taking knowledge, including negative know-how, and techniques from Unix that were completely ridiculous.)

And, as I recall, there were allegations that some of the AT&T code was actually Berkeley code originally.

The packet filter, for one thing. Yup.

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