09-09-2013, 03:14 PM
An Introduction to UNIX operating system.
Objectives
Learn to Introduction of Operating System.
Learn about various UNIX architecture, Characteristics and types of terminal and types of Shell.
Tools / Preparation:
In the system first required to install Unix/Linux Operating System with the proper drivers.
Operating System :
The operating system (OS) is the program which starts up when you turn on your computer and runs underneath all other programs - without it nothing would happen at all.
In simple terms, an operating system is a manager. It manages all the available resources on a computer, from the CPU, to memory, to hard disk accesses.
Tasks the operating system must perform:
Control Hardware - The operating system controls all the parts of the computer and attempts to get everything working together.
Run Applications - Another job the OS does is run application software. This would include word processors, web browsers, games, etc...
UNIX HISTORY
The UNIX operating system was born in the late 1960s. It originally began as a one man project led by Ken Thompson of Bell Labs, and has since grown to become the most widely used operating system.
In the time since UNIX was first developed, it has gone through many different generations and even mutations.
Some differ substantially from the original version, like Berkeley Software Distribution (BSD) or Linux.
Others, still contain major portions that are based on the original source code.
Bourne Again Shell (BASH)
Bash is a Unix shell written for the GNU Project.
The name of the actual executable is bash. Its name is an acronym for Bourne-again shell, a pun on the name of the Bourne shell (sh) (i.e. “Bourne again” or “born again”), an early and important Unix shell written by Stephen Bourne and distributed with Version 7 Unix circa 1978.
Bash was created in 1987 by Brian Fox. In 1990 Chet Ramey became the primary maintainer. Bash is the default shell on most Linux systems as well as on Mac OS X and it can be run on most Unix-like operating systems.