Ubuntu 14.04

　　sudo apt-get firefox

sudo apt-get install python-pip

sudo apt-get install xvfb
# xserver-xephyr vnc4server

sudo pip install pyvirtualdisplay

# 可选

sudo apt-get install python-pil scrot

sudo pip install pyscreenshot

# optional for examples

sudo pip install entrypoint2

from pyvirtualdisplay import Display
from selenium import webdriver

display = Display(visible=0, size=(800, 600))
display.start()
browser = webdriver.Firefox(executable_path=r'/usr/bin/firefox')
browser.get('https://www.baidu.com')
print browser.title
browser.quit()
display.stop()