History of unix operating system
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History of unix operating system

History of Unix operating system

This system is considered one of the oldest operating systems in the computer and appeared in 1969 among universities and research centers and BELL laboratories they make the first version of UNIX operating system and the UNIX can be move between different computer and it provides hundreds of programs that makes the the system easy to use

Properties of the unix
Properties of the UNIX

Unix system considered from the powerful operation systems because it depends on various concepts:

_Multitasking: means that UNIX can make more than one task in the same time

_Multi user: means that UNIX allow more than one user to sign in to the system

_Distributed: means that UNIX allow the users to use the system resources through the network

Features of the unix system
Features of the UNIX system

Stable: means that the system has no freeze problems

Security: means that there is no viruses in the system

Types of application software: like realplayer drawer office

The ability to connect to devices that uses Windows system

The UNIX system contains an instant chatting programs like (icq,aol)

Advanteges and disadvantages of unix system
Advanteges and Disadvantages of UNIX system

We would talk about the important advantgae of this system that is this system has a graphical interface.

The main disadvantage of this operating system that it doesn’t setup in any computer it needs a special computers like (IBM and COMPAQ)

File system in the unix
File system in the UNIX

File system is a system defined by the kernel of the system tells us how to store the files and the main built of system files created from symbols and files

The types the symbols in the system:

_main symbols and it has another name (root)

_subsidiary symbols

Functions of some symbols
Functions of some symbols

1_(/):means that this the base of the system

2_(USR/):folder composes from files and evidences

3_(bin/):this folder contain the operation files for the system

4_(home/):this folder include the virtual evidences

5_(dev/):folder includes all files of the connected devices in the system