在Ubuntu上安装Chrome Driver和Firefox Driver

首先下载Chrome Driver（Firefox Driver的安装与该步骤相同）

链接：

http://chromedriver.storage.googleapis.com/index.html

接下来在控制台（terminal）上操作一下红色字体的指令：

• Install Unzip

sudo apt-get install unzip

• Assuming you’re running a 64-bit OS, download the latest version of chromedriver from their website

wget -N http://chromedriver.storage.googleapis.com/2.10/chromedriver_linux64.zip -P ~/Downloads

unzip ~/Downloads/chromedriver_linux64.zip -d ~/Downloads

• Make the file you downloaded executable, and move it to /usr/local/share

chmod +x ~/Downloads/chromedriver

sudo mv -f ~/Downloads/chromedriver /usr/local/share/chromedriver

• Also, create symlinks to the chromedriver. Cucumber would look for the drivers in /usr/bin/chromedriver

sudo ln -s /usr/local/share/chromedriver /usr/local/bin/chromedriver

sudo ln -s /usr/local/share/chromedriver /usr/bin/chromedriver