X Frame Buffer Installation on CentOS

Installation:

  sudo yum -y install firefox Xvfb libXfont Xorg

Launch an XWindows Virtual Frame Buffer(XVFB) session on display port 99:

  Xvfb :99 -ac -screen 0 1280x1024x24 &

Tell all XWindows applications in this terminal session to use the new Xvfb display port:

  export DISPLAY=:99