ubuntu selenium webdriver chromedriver chrome set up
download chromedriver
https://github.com/SeleniumHQ/selenium/wiki/ChromeDriver
https://sites.google.com/a/chromium.org/chromedriver/downloads
unzip it to
/usr/bin/chromedriver
then
require 'selenium-webdriver'
#Selenium初期化
ff = Selenium::WebDriver.for(:chrome)
ff.navigate.to("http://www.yahoo.com/")