I've started to learn Blender by myself with all tutos on the web. I really enjoy Blender.
First sorry for my english...
I have a problem to make a bump on the normal node.
So I try witha very simple cube. Il I put a checker on the normal node the cube become b&w and I don't "see" bump.

[![enter image description here](https://i.stack.imgur.com/UF8GO.jpg)](https://i.stack.imgur.com/UF8GO.jpg)
[![enter image description here](https://i.stack.imgur.com/avalp.jpg)](https://i.stack.imgur.com/avalp.jpg)
[![enter image description here](https://i.stack.imgur.com/3vp4o.png)](https://i.stack.imgur.com/3vp4o.png)

If I add a normal map node I see the cube grey and white but still no bump...

[![enter image description here](https://i.stack.imgur.com/YZAVt.jpg)](https://i.stack.imgur.com/YZAVt.jpg)
[![enter image description here](https://i.stack.imgur.com/b2NW0.png)](https://i.stack.imgur.com/b2NW0.png)

What have I missed? I have Blender 2.8 and filmic add-on.

Thank you very much for help.