Xvfb or X virtual framebuffer

X virtual framebuffer is a display server using the X11 protocol. In contrast to other display servers, it performs all graphical operations in memory without showing any screen output. which makes it ideal for some surprising uses. e.g.

(above snippet via Wikipedia)

I had to run xvfb automatically on boot on a centos system, here’s the init script I used to carry out the task. add the following as a script to /etc/init.d , chmod +x the script then chkconfig xvfb on

* Note: see the :11 in the middle of the script? change that to another number to change the display port.

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