内容简介 ：
Introduction
Since its first public release in 1991, Linux has been put to ever wider uses. Initially confined to a loosely
tied group of developers and enthusiasts on the Internet, it eventually matured into a solid Unix-like
operating system for workstations, servers, and clusters. Its growth and popularity accelerated the work
started by the Free Software Foundation (FSF) and fueled what would later be known as the open source
movement. All the while, it attracted media and business interest, which contributed to establishing
Linux's presence as a legitimate and viable choice for an operating system.
Yet, oddly enough, it is through an often ignored segment of computerized devices that Linux is poised to
become the preferred operating system. That segment is embedded systems, and the bulk of the computer
systems found in our modern day lives belong to it. Embedded systems are everywhere in our lives, from
mobile phones to medical equipment, including air navigation systems, automated bank tellers, MP3
players, printers, cars, and a slew of other devices about which we are often unaware. Every time you look
around and can identify a device as containing a microprocessor, you've most likely found another
embedded system.
If you are reading this book, you probably have a basic idea why one would want to run an embedded
system using Linux. Whether because of its flexibility, its robustness, its price tag, the community
developing it, or the large number of vendors supporting it, there are many reasons for choosing to build
an embedded system with Linux and many ways to carry out the task. This chapter provides the
background for the material presented in the rest of the book by discussing definitions, real-life issues,
generic embedded Linux systems architecture, examples, and methodology.