On 1/14/2016 4:20 PM, Rugxulo wrote:
> Linus Torvalds heavily studied and used Minix sources, which was a 
> UNIX (tm) clone. It was not free/libre at all, they were commercially 
> selling it with their text book about OSes.
Sorry, but that is not correct. Minix was distributed by Tanenbaum (who 
was at that time a professor at the university of Amsterdam) for the 
explicit purpose for students to read and study a Unix like OS. The 
charge was only for the book that the source code was published in, with 
a small fee for the media (floppy disks) if you wanted to have it in 
digital form. The first version available (1.1) was on 8 360KB 5.25" 
floppy disc, costing something around DM30,- back then. I remember that 
because I bought those (but never bought the book).
So Linus was full within the rights granted by Tanenbaum (Prentice-Hall 
as the publisher). And the only thing he actually "copied" (kind of) was 
the file system.
He started Linux also from the get-go as a 80386/32bit project (while 
Minix at that time was only 16bit, 80286 code), using an early version 
of GCC instead of the ACK (Amsterdam Compiler Kit) C compiler used and 
bundled with the Minix floppy disks...
Got a copy of Linux v0.12, on 3 720K 3.5" floppy disks from an intern at 
the company I was working at at that time after I had brought those 
Minix disks to work a few days earlier.


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