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

CS310, Ask question #Minimashdhdghfdgdfgdsgfdsgdsgdgdfgdgfdgdfgdfgdfsgfdsgd...

Ask question #Minimashdhdghfdgdfgdsgfdsgdsgdgdfgdgfdgdfgdfgdfsgfdsgdfsgum 100 words accepted#

Scheme, There is a path between two vertices if there is a series of edges ...

There is a path between two vertices if there is a series of edges that you can use to travel between them. For example, between vertices 1 and 3 above, there is a path made up of

Digital to analogue conversion (dac), Digital to analogue conversion (dac):...

Digital to analogue conversion (dac): Since many systems used on aircraft will require outputs in analogue form, it will be necessary to be able to convert the digital informat

Pipelining, tellme the types of pipelining

tellme the types of pipelining

Explain code editor window and solution explorer, Question 1 Explain the c...

Question 1 Explain the components of the .NET Framework also give a diagram for this Question 2 Explain Code Editor Window and Solution Explorer Question 3 Write a

Types of printers, Types of Printers 1. Impact printers The impact...

Types of Printers 1. Impact printers The impact printers produce the image through a mechanism of striking on the stationary. 2. Line Printer This type of printer

OPERATING SYSTEM, WHAT IS MULTIPLE CONTIGUOUS VARIABLE PARTITIONING

WHAT IS MULTIPLE CONTIGUOUS VARIABLE PARTITIONING

2. What benefits can a company gain by managing its , 2. What benefits can ...

2. What benefits can a company gain by managing its own information infrastructure and services?

Memory access, Memory access: The use of semi-conductor memory elements...

Memory access: The use of semi-conductor memory elements (bistables) has been made possible by the use of large scale integrated circuits (LSI) which provide reliability, ease

What is atm cell, Header contains routing and error control information Pay...

Header contains routing and error control information Payload carries the actual user information, either voice, data or video

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