trouble shooting(ubuntu\mac,os,shell,command line always to be continue)

login screen: sudo gpasswd -d $USER nopasswdlogin (just don't need pass for login screen)

root pass: https://www.youtube.com/watch?v=5GeVMDQsDpc

black screen:重装了系统。install 密码要记得

http://blog.csdn.net/VincentLuo91/article/details/53007135

git　　http://blog.csdn.net/fishball1/article/details/52020305

查看notebook http://blog.sina.com.cn/s/blog_a869dd250102wuqp.html