UNIX is an operating system which was first developed in the 1960s, and has been under constant development ever since. By operating system, we mean the suite of programs which make the computer work. It is a
* Portability
* Hierarchical file structure
* multi-user,
* multi-tasking system for servers, desktops and laptops.
UNIX systems also have a graphical user interface similar to Microsoft Windows which provides an easy to use environment. However, knowledge of UNIX is required for operations which aren't covered by a graphical program, or for when there is no windows interface available.
UNIX is an open source operating system.That means user has the freedom to
-develop softwares,
-same copy can use to install unix in several computers
-there is no licence to agree
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