Command processor and user interface, Basic Computer Science

Assignment Help:

Command Processor and User Interface:

To the user, the most important and visible services provided by the OS is the user interface and the capabilities that it provides to execute commands which may not be a part of OS.  

Instead these systems consider the user interface as a separate shell that is provided with the operating system and that interacts with the kernel to provide the necessary-user command  capabilities. In UNIX, three different shells, the C shell, the Bourne shell, and the Korn shell are in common use, and many other shells for UNIX are available. Each of these shells provides different command structures and different capabilities.  

Different types of user interface exist. The most common are the graphical user interface, or GUI, and the command line interface. The graphical user interface accepts commands primarily in the form of drop-down menus, mouse movements, and mouse clicks. The command line interface relies on typed commands which provide direct access to various methods within operating system such as File system, I/O system, and network services.

UNIX allows certain class of users called  superusers  to use some kind of commands for  changing the platform or access rights. Command languages extend the power and flexibilities of the operating system and simplify use of the system for less sophisticated users.  


Related Discussions:- Command processor and user interface

What are the various skills needed for broadcasting and film, Question 1 W...

Question 1 What are the various skills needed for broadcasting and film? Question 2 What is a 2 dimensional animations and 3 dimensional animations? Question 3 Different

Concept in programming language, CONCEPT IN PROGRAMMING LANGUAGE: A Pr...

CONCEPT IN PROGRAMMING LANGUAGE: A Programming Language is used to design and describe a set of instructions and computations to be executed by a computer. To do programming,

Explain any two issues in web design, Question 1 Explain any two issues in...

Question 1 Explain any two issues in web design Question 2 Mention the factors considered for good design Question 3 What are the advantages of graphical system?

Short program to practice assembly language loops, Purpose of Code This...

Purpose of Code This is a short program to practice assembly language loops and if/else statements. You will use various jump commands and the cmp instruction.  The progra

Digital computer, Digital computer: In the digital computer there are b...

Digital computer: In the digital computer there are basically two types of input, namely Instructions, and Data from the various radio and non-radio sensors, which will be refe

Functions, difference between recursion and iteration

difference between recursion and iteration

Client - server architecture, Client/ Server Architecture:   As the ca...

Client/ Server Architecture:   As the capacity and power of personal computers improved, the need to share the processing demands between the host server and the client workst

C language, parent and child process using c language

parent and child process using c language

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd