Ubuntu 命令技巧手册：收集整理这一本《Ubuntu 命令技巧手册》是希望更多人去学习、使用开源世界的软件系统，让更多的人去接受、理解开源软件。-Ubuntu command skills manual: to compile this the " Ubuntu Command Skills Handbook"　is to enable people to learn, to use open source software world, more people to accept and understand the open source software.