网站地址集锦

git hub:

https://try.github.io/levels/1/challenges/1

linux:

http://linuxsurvival.com/

selenium:

http://www.seleniumhq.org/docs/02_selenium_ide.jsp#alerts-popups-and-multiple-windows

view ip addr. in Ubuntu:

http://www.wikihow.com/Check-the-IP-Address-in-Linux

install safari in Ubuntu:

http://www.guguncube.com/694/ubuntu-how-to-install-apple-safari-in-ubuntu-12-04-12-10-13-10-14-04-14-10