22-06-2012, 02:07 PM
SEMINAR ON STUDY OF UNIX OPERATING SYSTEM
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UNIX OPERATING SYSTEM
UNIX operating system is like a layer between the hardware and applications that run on the computer. It has functions that manage the hardware and functions that manage executing applications.
The UNIX system is strictly an operating system, which includes the traditional operating system components.UNIX system includes a set of libraries and a set of application.
The part of UNIX that manage the hardware and the executing processes is called the KERNEL. In managing all hardware devices, the UNIX system views each device as a file called a device file. It implements security control to protect the safety and privacy of information. In executing process, the UNIX system allocates resources including use of the CPU and mediates accesses to the hardware.
FEATURES OF UNIX
1. MULTITASKING:
Multitasking is the capability of the operating system to perform various tasks simultaneously . i.e., A single user can run /multiple programs concurrently.
2. MULTIUSER CAPABILITY:
Multiuser capability of UNIX allows several users to use the same computers to perform their tasks. Several terminals (Keyboard and Monitors) are connected to a single powerful computer (UNIX server) and each user can work with their terminals.
3. SECURITY:
UNIX allows sharing of data. Every user must have a login name and a password.So, accessing another user’s data is impossible without permission. i.e., Invalid users cannot access data.
4. PORTABILITY:
UNIX is portable because it is written in a high level language. So UNIX can be run on different computers.
5. COMMUNICATION:
UNIX supports the following communication.
i) Between the different terminals connected to the UNIX server.
ii) Between the user of the one computer to the user of another computer located elsewhere in the network.