Operating Systems 2019W Lecture 12

Video

The video for the lecture given on February 27, 2019 is now available.

Readings

These Wikipedia readings are all optional; however, they will give you more background on the topics covered in lecture. Be sure to follow the references for the parts you find interesting!

• History of Unix
• Unix wars
• USL v. BSDi
• GNU General Public License
• Richard Stallman
• Copyleft
• History of Linux
• Git
• Open-source license

And when you want to browse the Linux kernel source code:

• Elixir cross reference of Linux at Bootlin

In-Class Notes

Lecture 12
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Licenses

In the beginning
* BSD license (3 clause)

Then there was
* SunOS/Solaris
* HP/UX
* AIX
* IRIX
...


And then came Richard Stallman
* founded the Free Software Foundation (FSF)
* came up with the idea of "copyleft"
* created the GNU General Public License (GPL)

But their kernel wasn't ready in the early 1990's

BSD had a kernel...but it was trapped in litigation

Linux stepped in to that gap

Hacking the kernel
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Look at an online Linux cross reference to look around

But...develop a module if you can