在Ubuntu 10.10 Maverick及以上版本安装pip和virtualenv

$ sudo apt-get install python-pip python-dev build-essential 
$ sudo pip install --upgrade pip 
$ sudo pip install --upgrade virtualenv

10.10以下版本Ubuntu，需要借助Easy Install

$ sudo apt-get install python-setuptools python-dev build-essential 
$ sudo easy_install pip 
$ sudo pip install --upgrade virtualenv