zhu zhu's List: UNIX

• UNIX is an operating system
• By operating   system, we mean the suite of programs which make the computer work.
• UNIX systems also have a graphical user interface (GUI)
• ifferent versions
• three parts;
• kernel,
• programs
• shell
• hub of the operating system:
• shell and the kernel work together
• requests the kernel, through   system calls, to execute the program rm on myfile.
• shell searches the filestore for the   file containing the program rm,
• between the user and the kernel.
• interface
• command line interpreter (CLI)

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