Hi All
Can any one of you help me out to get the answers of following questions :
1. How will u list the contents of parent directory from the current directory.
2. What are the default system wide permissions for a file and directory.
3.What is the default umask value.
4.A user is not able to change the permission , What can it happen.
5. What's the difference between ls -F , ls -p
6. If a file permission are 000, can the superuser still read and write to that file.
7. What's the command to remove the files without write permission.
8. How will u make sure that no one can see the files which u had created.
9. How will u change the permissions of a directory recursively.
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Ashok Kumar R
Answered On : Sep 19th, 2006
OS is an System(hardware&software) Manager.
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Alon Moscovitz
Answered On : Nov 2nd, 2006
The shortest definition I can think of is "The software infrastructure".
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ritu
Answered On : Nov 12th, 2006
It's the system that is always on till our computer is on.
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shijine
Answered On : Nov 28th, 2006
It's an interface between user and the computer hardware.

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ramesh
Answered On : Dec 6th, 2006
OS is like a traffic policeman on duty.It keeps track of the resources.It decides the policy to allocate resources.It allocates the resources.It de-allocate the resources.
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OS is a set of programs which
controls hardware.
acts as platform for applications
interacts with user.

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kausik jana
Answered On : Jan 24th, 2007
Operating system is nothing but it is interfaced between hardware & software.
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ravi
Answered On : Mar 4th, 2007
OS is a Interface between a user and the hardware of a computer
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It acts as an interface between the user and the hardware.
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OS is an interface between user and the system.
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Sandeep K Achar
Answered On : Jul 19th, 2011
It's an user interface for the users to interact with the computer...
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Milind
Answered On : Aug 18th, 2011
Operating System is the program to interface between user and computer.
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deepak
Answered On : Aug 22nd, 2011
You can say.........Operating System is an interface between user and hardware
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Rohit
Answered On : Aug 26th, 2011
It is a software or a set of programs that make an interface between user and hardware.
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puneet rana
Answered On : Aug 30th, 2011
Communicator
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Marks
Answered On : Feb 28th, 2012
OS is ..
1.Resource Manager
2.Interface between Hardware and Software.
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vivek tomar
Answered On : Mar 10th, 2012
1)data Management. (file ,folder,drive,also contain data.)
2)communicator b/w software and hardware.
3)provide user Interface.
4)provide working environment.
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anon
Answered On : May 3rd, 2012
Operating System;
System which controls the operations of the hardware. Serves as an intermediary between the application layer and the hardware it interfaces with.

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Lingapandi
Answered On : Jun 4th, 2012
Operating system is a system software.
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