On 4.4.17 15:09, Martin Gregorie wrote:
> On Tue, 04 Apr 2017 12:53:17 +0100, Ahem A Rivet's Shot wrote:
>
>> AFAIK there were no patents on Unix, there were however copyright
>> restrictions on the AT&T source code which Linux avoided by the simple
>> (in principle) expedient of being a clean rewrite while BSD got
>> embroiled in a legal argument over which bits they could distribute and
>> which bits they could not.
>
> I thought Linux was originally a clean rewrite of Minix, which was itself
> a clean rewrite of UNIX for early Intel chips/PCs.


There is a definite difference in the kernel structure:
Minix is a microkernel architecture, but Linux has a
monolithic kernel.

However, Linus used similar file system initally as Minix.

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