Command processor and user interface, Basic Computer Science

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.  

Posted Date: 10/23/2012 4:19:13 AM | Location : United States







Related Discussions:- Command processor and user interface, Assignment Help, Ask Question on Command processor and user interface, Get Answer, Expert's Help, Command processor and user interface Discussions

Write discussion on Command processor and user interface
Your posts are moderated
Related Questions
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

Choice of Medium: All the transmission channels discussed in the foregoing paragraphs can be used as point to point connections or as broadcast systems. Transmitting informati

Many persons are taught AI with the opening line: " The three most important things in AI are representation, representation and representation ". While selecting the method of


Digital Transmission: In digital transmission, wave patterns are translated into discrete bits and are separated by intervals. Bits (contraction for binary digits) are the sma

Keystroke logger and Data-stealing: Keystroke loggers: This is a program, once installed on the system, which intercepts the keys when entering the password or the Credit Ca

convert the following in to binary 108

Open Systems Interconnection (OS1): As there are many different protocols for LANs and WANs, communication between two different systems can be difficult. The International St

Operating system services: In this section we consider basic services supported by an operating system. There are many building blocks to be considered, not all of which will