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What is Unix & Types of UNIX?

What is Unix? UNIX is  associate degree   OS  that was  1st  developed  within the  1960's , and has been  below  continuous development ever since. By  OS ,  we have a tendency to  mean programs that do  pc  work.  it's  a stable, multi-user, multi-tasking system for servers, desktops and laptops. UNIX systems  even have  a graphical  programmer (GUI)  almost like  Microsoft Windows  that's   straightforward  to use  within the   atmosphere , however, the operation  needs   data  of  OS ,  that   isn't   coated  by any graphical program, or  once   there's  no Windows interface  out there ,  for instance ,  in a very  telnet session. Types of UNIX? There  area unit   many alternative  versions of  OS ,  though  they share similar similarities.  the foremost   common   types of   OS   area unit  Sun Solaris,  antelope  /  UNIX  and MacOS X. The  OS   OS   is formed   of   3  parts; Kernel, Shell and Program The kernel The kernel of  UNIX system  system | operating s