Selenium is an open-source solution for automating the browser allowing you to run continuous integration tests, validate performance and scalability, and perform regression testing of web applications.
This kind of automated testing is useful not only from desktop systems, but also from server machines where you may want to monitor availability or correctness of returned pages. For example, web site response monitoring or as part of a Jenkins validation pipeline.
The first method we can use to accomplish this is to use a headless driver such as the HtmlUnit or PhantomJS driver – these are tiny browser implementations that load and execute web pages but do not actually draw the results to a screen.
The second method is specific to Linux based systems, where you use the actual Chrome browser. The trick is to use Xvfb as a virtualized display.