Fixing a crack on the wall is not a very difficult thing to do if you are doing it the right way. The first thing that you will have to do is open the crack up so that you can do a proper job with the plaster and get the area filled up. The tool that you will need for this part of the job is a grout remover.
This is a very important part of the job and you have to make sure that it has been taken care of properly before you can go any further with filling up the hole. After that, you will have to make a little bit of filling. You have to use plaster of Paris and get it mixed with joint compound. This mixture has to be filled in the crack hole of the wall.
Then, you will have to even out the surface with a spade. After getting surface evened out you will have to wait for some time so that area dries up completely. When you see the area has been dried up, you will have to get the spot painted with the same color as that of the wall.