S3C2440的GPIO的控制是基于2.4内核驱动程序的开发，

写一个脚本文件checkuser,该脚本运行时带一个用户名作为参数，具体要求如下： 1)如果命令行格式不符合要求，应有错误提示信息； 2)在/etc/passwd文件中查找是否有该用户， 如有，则输出“Found in the /etc/passwd file.” 否则，输出“No such on our system” -Write a script file checkuser, the script run-time with a user name as a parameter, and specific requirements are as follows: 1) If the command-line format does not meet the requirements, there should be error message 2) in/etc/passwd file to check if there were any users, and if so, then the output " Found in the/etc/passwd file. " Otherwise, output" No such on our system "

Linux设备驱动程序第三版,非常经典,Linux设备驱动编程必看-Linux device driver ver3

讲述如何在Linux平台上开发出高性能服务器.-Describes how in the Linux platform to develop high-performance servers.

进程间调度，共享内存，进程通信，子进程创建-inter-process scheduling, shared memory and process communications, process-creation

一个Open Source的小型图形系统，支持多窗口剪切，Truetype字体，JPEG，GIF图形-A small Open Source graphics system to support multi-window shearing, Truetype fonts, JPEG, GIF graphics

Linux下编程实现服务器与客户端的连接-Programming Linux server and client connections

embedded linux c development environment introduction

带宽测量算法spruce源代码，能够实现对网络带宽的测量-Bandwidth measurement algorithm spruce source code, be able to achieve the measurement of network bandwidth

浏览器的源代码,可移植到嵌入式设备.-browser"s source code can be transplanted to embedded devices.

实现服务定向协议(SLP)的程序库-services targeted to achieve agreement (SLP), the library