The UNIX Operating System

The UNIX Operating System - at AT&T Bell Labs....

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
The UNIX Operating System
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
What is an Operating System An Operating System (OS) is a program that sits in between the hardware and the user programs. It provides: Multitasking - Multiple processes running in the same computer Multiuser - Multiple users using the same computer File system – Storage Networking – Access to the network and internet
Background image of page 2
What is an Operating System Window System – Graphical use interface Standard Programs – Programs such as a web browser, task manager, editors, compilers etc. Common Libraries – Libraries common to all programs running in the computer such as math library, string library, window library, c library etc. It has to do all of the above in a secure and reliable manner.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
A Tour of UNIX We will start by describing the UNIX operating system (OS). Understanding one instance of an Operating System will help us understand other OSs such as Windows, Mac OS, Linux etc. UNIX is an operating system created in 1969 by Ken Thompson, Dennis Ritchie, Brian Kernighan, and others
Background image of page 4
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 6
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: at AT&T Bell Labs. UNIX was a successor of another OS called MULTICS that was more innovative but it had many problems. UNIX was smaller, faster, and more reliable than MULTICS. A Tour of UNIX UNIX was initially created to support typesetting (edition of documents). By having the programmers being the users themselves of the OS (it your own food), UNIX became the robust, practical system that we know today. UNIX was written in C (95%) and assembly language (5%). This allowed UNIX to be ported to other machines besides Digital Equipment (DEC)s PDP11. BSD UNIX UNIX was a success in the universities. Universities wanted to modify the UNIX sources for experimentation do Berkeley created its own version of UNIX called BSD-UNIX. POSIX is an organization that created the POSIX UNIX standard to unify the different flavors of UNIX. Sockets, FTP, Mail etc came from BSD...
View Full Document

Page1 / 6

The UNIX Operating System - at AT&T Bell Labs....

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online