Introduction of UNIX

Posted by Bhavesh Joshi On Wednesday, February 16, 2011 0 comments


Pronounced yoo-niks, a popular multi-user, multi-tasking operating system developed in the 1960s at the bell laboratory. Created by just a handful of programmers, UNIX was designed to be a small, flexible system used exclusively by programmers. UNIX is a highly programmable language (an operating system) and still regarded as one of the most powerful, versatile, and flexible operating system (OS) in the computer world. UNIX Systems have Graphical User Interface (GUI) facility like Microsoft Windows which to easy to use. The most famous varieties of UNIX are Sun Solaris, GNU/Linux, and MacOS X.

It was designed for a programmer not for a casual end-user. A programmer can easily operate UNIX operating system.

Multi-tasking Facility
Many computers do just only one thing at a time, as anyone who uses a PC or laptop can attest. But, on the other hand, UNIX lets a computer do several things at once, such as printing out one file while the user edits another file. This is a major feature for users, since users don’t have to wait for one application to end before starting another one.

Multi-user Facility
The computer can take the commands of a number of users, determined by the design of the computer to run programs, access files, and print documents at the same time. This is the best facility of UNIX.

It has fast speed with respect to others and it is mainly divided in three parts as follows -
1. The Kernel
2. The shell and
3. The programs

The Kernel
It controls the hardware and turns part of the system on and off at the programmer’s command. If you ask the computer to list all the files in a directory then, the kernel tells the computer to read all the files in that directory from the disk and display them on your screen.

The Shell
Shell is used to act as an interpreter between the user and the computer as its purpose is same like Kernel. There are several types of shell as most notably the command driven Bourne Shell, the C Shell (no pun intended), and menu-driven shells that make it easier for beginners to use.

The Programs
There are hundreds of programs available to UNIX users. Typically, they are grouped into categories for certain functions, such as word processing, business applications, or programming.

The main features of UNIX are—
• Multitasking capability
• Multiuser capability
• Portability
• UNIX programs
• Library of application software

Finally, UNIX is the best operating system, very admired as today it is using by billions of peoples…


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