Linux-Tutorial

在线常见命令整理:
http://man.linuxde.net
https://www.centos.bz/linux-basic-knowledge/
http://itlab.idcquan.com/linux/special/linuxcom/Index.html
http://ganquan.info/linux/
http://wiki.open.qq.com/wiki/faq/linux……BB%A4
http://i.linuxtoy.org/files/pdf/fwunixref.pdf
http://waterlab.whu.edu.cn/hpc/upload/2010/6/LinuxCommand.pdf
http://www.linux265.com/download/linux_cmd.pdf

CHM文件常用命令整理:
http://www.centoscn.com/CentosSoft/pdf/2013/0413/277.html

常见快捷键(在Ubuntu桌面上,常按win键也可以调用出系统快捷键目录列表说明):
http://blog.csdn.net/xiaojianpitt/article/details/7393058
http://www.ubuntukylin.com/ask/index.php?qa=jc_4

不错的ubuntu社区,可以在上面找资料和问题:
http://www.wikihow.com/Category:Ubuntu

源列表推荐:
http://wiki.ubuntu.org.cn/Qref/Source
http://www.zhihu.com/question/19816319