一、安装phantomjs

1.从官网下载 

2.加压 tar -zxvf phantomjs-2.1.1-linux-x86_64.tar.bz2

3.mv phantomjs-2.1.1-linux-x86_64 /usr/local/share/phantomjs

4.链接到bin下:ln -s /usr/local/share/phantomjs/bin/phantomjs /usr/local/bin/phantomjs

5.配置环境变量：sudo vim /etc/profile 添加export PATH=${PATH}:/usr/local/bin/phantomjs

二、安装chromedriver

1.从http://chromedriver.storage.googleapis.com/index.html下载对应的版本

2.解压 unzip chromedriver_linux64.zip 

3.然后移动到 /usr/local/bin下

三、安装geckodriver

1.从https://github.com/mozilla/geckodriver/releases下载 后面安装和chromedriver相同