Operating Systems

Servers may use many different operating systems, but the ones you will most often encounter will be using either Unix or Linux.

What is an operating system?

There are more than a few.

How Operating Systems Work - to quote How Stuff Works,

At the simplest level, an operating system does two things:  model of the layers of software incorporated in the operating system
  1. It manages the hardware and software resources of the computer system. These resources include such things as the processor, memory, disk space, etc.
  2. It provides a stable, consistent way for applications to deal with the hardware without having to know all the details of the hardware.

Operating systems can be either clients or servers

schematic of how UNIX works like a bullseye with the Kernel at the center, surrounded by the Shell, 
							which is surrounded by the Applications

clients and/or servers:

Windows
Mac
Linux

usually seen as a server OS:

UNIX

So, let's look at UNIX

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