本书《Ubuntu 参考手册》的目的是对整个Ubuntu 系统作一个全面的介绍，提供一本

“安装之後的”用户使用手册。本手册的读者应该愿意阅读shell 脚本（scr ipts）。我也假定读者在阅读之前已经具备了类Unix 系统的基本操作技能。-Book " Ubuntu Reference Manual"　is to the entire Ubuntu system as a comprehensive introduction to provide an " installation"　user manual. Readers of this manual should be willing to read shell scr ipts (scr ipts). I also assume that readers already have a class before the basic skills in Unix systems.