转自：http://blog.51osos.com/linux/how-to-install-skype-in-ubuntu-12-04/
添加Canonical Partner Repository 并安装skype
sudo add-apt-repository "deb http://archive.canonical.com/ $(lsb_release -sc) partner" sudo apt-get update && sudo apt-get install skype
详见官方wiki：https://help.ubuntu.com/community/Skype