Tutorial for making 2d text-based game in opengl in c++

Hey everyone. I am wondering if any of you know where i can find a good tutorial on how to use opengl in c++ to make a 2d text-based game, something kind of like dwarf fortress, but a whole lot simpler. I have already started a game with menus and options and whatnot but id like to convert the graphical output to opengl. I have looked on the internet and most everything i find is making a 3d game. Also, i've seen SDL in some of the things ive seen.

Thanks for the suggestions in advance and i would also prefer if the guides were written for coding in linux but that is just a preference. Thanks again,

Adam