Must be an operating system as its hardware system based on close co

代码说明：

一个操作系统必须和作为它的基础的硬件系统紧密配合。操作系统需要使用一些只有硬件才能提供的功能。为了完整的了解 Linux ，你需要了解底层硬件的基础知识。-Must be an operating system as its hardware system based on close co-operation. Operating system only need to use some of the functions of the hardware can provide. In order to complete understanding of Linux, you need to know basic knowledge of the underlying hardware.