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在 2012 年，四核 ARM 处理器还是个新鲜事物，但短短一年时间之后，嵌入式多核系统 已经深入人心，并开始大面积普及应用，以极快的速度向工控、仪表等行业延伸，这些都是我 们始料不及的。 面对这样的形势，我们是固守还是迎接新的挑战？答案是肯定的，世界的潮流永远是浩 浩荡荡，不会停止前进的脚步。 如果我们固守，老旧的芯片价格将越来越贵，例如多年前大量使用的 SDRAM 价格已经 很高昂，几年前的 DDR2 也开始不便宜，现在的 DDR3 反倒性价比更高，其他芯片包括存储 介质也是这样。 如果我们停滞不前，一些新系统、新架构所带来的生产力将不能在新产品中体现，竞争 能力以及产品优势随之会受到影响。 同时，以前掌握的知识和能力将逐渐陈旧，越来越不能适应时代不断发展、需求不断进 步给我们提出的新要求。 发展是硬道理，尤其在信息技术这个领域，只有不断学习，积极改变才能把握先机，赢 得更多的机遇和挑战。 从架构上来讲，多核系统比单核要复杂很多，性能也成倍增长，但掌握它真的很难吗？ 实际上，从嵌入式系统开发的角度来看，所谓的‘四核’其实并没有多少改变，留给我 们开发人员的工作跟以前也没有多少差别，因为 Linux 本身一直是支持多核的。 实际开发的时候，我们会发现，多核系统的驱动和应用程序的编程方式、编程理念、编 译工具、以及开发方法和原来单核系统并无差别。 作为一款开发板的产品手册，我们将尽可能详尽的为大家讲解 Exynos 4412 这款处理器 的系统应用特点，对于开发过程中可能碰到的难点和问题给予较全面的说明。 欢迎广大用户提出宝贵意见，便于我们更好的改进和提高！

目录 第一篇 Linux 基础 ··············································································1 第 1 章 Linux 操作系统简介 ·································································2 1.1 Linux 内核·····················································································2 1.1.1 简介·······················································································2 1.1.2 特点·······················································································3 1.1.3 内核版本号 ·············································································5 1.1.4 组成部分·················································································6 1.2 Linux 发行版··················································································9 1.3 嵌入式 Linux················································································12 1.3.1 嵌入式 Linux 的特点································································12 1.3.2 嵌入式 Linux 的产品形态··························································12 第 2 章 安装 Linux 操作系统 ·······························································14 2.1 获得 Linux 环境的三种方式·····························································14 2.2 发行版选择和 ISO 下载 ··································································15 2.3 VMware Player 软件·······································································16 2.3.1 下载和安装 ···········································································16 2.3.2 设置虚拟化支持 ·····································································18 2.4 使用现成的虚拟机 ········································································19 2.5 创建和配置虚拟机 ········································································23 2.5.1 创建虚拟机 ···········································································23 2.5.2 虚拟机设置 ···········································································26 2.6 安装 Ubuntu·················································································28 2.6.1 实体机安装前准备 ··································································28 2.6.2 虚拟机安装前准备 ··································································30 2.6.3 正式安装 Ubuntu·····································································32 2.7 初识 Ubuntu·················································································36 2.7.1 Ubuntu 桌面···········································································36 2.7.2 输入法··················································································37 2.7.3 系统设置···············································································37

《构建嵌入式Linux系统》详细解释了多种不同的目标架构和硬件配置，包括彻底分析支持嵌入式硬件的Linux。所有的解释都针对的是开源和自由软件包。通过演示如何从源码建立操作系统组件，以及如何查找更多文档的帮助。《构建嵌入式Linux系统》极大地简化了完全控制嵌入式操作系统的任务，不管是基于技术还是经济上的原因。 作者简介: 作者KarimYaghmour是一位著名的设计者和演讲者，他负责LinuxTraceToolkit。本书从讨论Linux作为嵌入式操作系统的优缺点开始，其中包括了许可证问题。然后讨论了构建嵌入式Linux系统的基础知识，随后的讨论涵盖了嵌入式Linux系统中广泛使用的40余种开源和自由软件包的配置、设置以及使用。uClibc、BusyBox、U-Boot、OpenSSH、thttpd、tftp、strace以及gdb都在讨论范围之中。

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