Prolog is a logical programming language perfect for description of artificial intelligence knowledge base I was working on for one of my AI projects. The idea is that you make a knowledge base and then ask your knowledge base what ever you need to know. As Linux user I needed Linux tool so I went on Google and inquired about my options. I really like GNU software so I've opted for GNU Prolog implementation called Gprolog. In this little article I will show you how to get it working on Debian based operating systems.