Linux Hint published a tutorial about how to install Xvfb on Ubuntu.
How to install Xvfb on Ubuntu
X virtual framebuffer abbreviated as Xvfb is designed for Unix/ Linux Operating System. It allows you to execute graphical apps without having to use a monitor by connecting some input device. All graphical operations are performed in virtual memory in Xvfb. It allows the program to run headlessly. This article explains how to install and use Xvfb on Ubuntu.
