A LCD display my RPi and RPi-Monitor

I saw on the internet that it is possible to use a LCD to display information from the Raspberry Pi. RPi-Monitor is gathering a lot of information and it could be interesting to have such an information available without a computer. So I decided to purchase a PCD8544 from dx.com.

Photo from Flickr  cc-by by arduinolabs

This post is describing how to acquire, connect and use such a component with he Raspberry Pi and gives an example showing how to connect it with RPi-Monitor.