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

Ask an Expert

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

Write your message here..

Related Questions

Necessary nurses records, Necessary Nurses Records The software shoul... Necessary Nurses Records The software should generate all registers/reports in detail summary for various permutations and combinations of options. A powerful SQL (Structure

Deadlocks, What is methods For handling Deadlocks? What is methods For handling Deadlocks?

Widening web, The Widening Web The idea, the whole world is agog... The Widening Web The idea, the whole world is agog now had accidental origins. Here is how it all began. In early 1969, the U.S. Defence department financed a network fo

What is fragmentation?, Question 1 What is fragmentation? Question ... Question 1 What is fragmentation? Question 2 Discuss the various service classes defined by integrated services Question 3 What are congestion? .Mention two algori

Artificial interlligence, 7. Name and explain the action in Conceptual Depe... 7. Name and explain the action in Conceptual Dependency which refers to a transfer of possession.

Explain particle collision in detail, Question 1 Name the different types ... Question 1 Name the different types of emitters and explain them in brief Question 2 List and explain the Particle Attributes Question 3 Explain Particle Collision

Digital design system, Manipulate the following Boolean expression in such ... Manipulate the following Boolean expression in such a way so that it can be implemented using exclusive-OR and AND gates only. AB''CD'' + A ''BCD'' + AB''C''D + A''BC''D

What is Decode or execution cycle?, just the once the instruction has bee... just the once the instruction has been fetched and is accumulated, the next step is to decode the instruction so as to work out what actions should be performed to execute it. This

Execute a command in operating system, Execute a command in operating syste... Execute a command in operating system: In order to execute a command OS does the following steps:   It accepts a command from a user through mouse clicks or from t

Respiratory system, 100 animals and their respiratory organs 100 animals and their respiratory organs