This paper requires an MIT personal certificate for access:
The UNIX Time-Sharing System. This recitation will focus on the
first four sections of the paper; the following recitation will focus
on the rest.
To help you as you read:
- By the end of section three, you should understand the
differences between ordinary files, directories, and special files.
- By the end of section four (along with section three), you should
be able to explain what happens when a user opens a file. For
instance, if a user opens
/home/example.txt, what does
the UNIX file system do in order to find the file's contents? You
should understand this in detail (e.g., at the i-node level). As
always, if you have any questions, post on Piazza!
As you read, you may also find it helpful to think about the
- What things in UNIX are named?
- How does naming in UNIX compare to naming in DNS? How do
layering and hierarchy apply (if at all)?
- UNIX was designed for programmers, by programmers. Who was a
programmer in this context? How does this affect the way we use
Question for Recitation
Before you come to this recitation, you'll turn in
a brief answer to the following questions (really—we
don't need more than a sentence or so for each question). Your TA will
be in touch about exactly how to turn that in.
Your answers to these questions should be in your own
words, not direct quotations from the paper.
As always, there are multiple correct answers for each of these questions.
- What is UNIX?
- How is its filesystem designed?
- Why was it designed to work that way?