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History of Unix operating system

History of Unix operating system.

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History of Unix operating system

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  1. 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

  2. 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

  3. 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)

  4. 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)

  5. Some photos for the interface of the UNIX system

  6. 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

  7. 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

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