Update And Install DOSBox:

sudo apt update
sudo apt install dosbox

Let's Make The Following Dir:

mkdir ~/dos-games

To Edit The DOSBox Config File, If Needed:

nano ~/.dosbox/dosbox-0.74-2.conf

Start DOSBox: 

dosbox

To Edit Key Mapper:

dosbox -startmapper

To Mount The Game:

mount c ~/dos-games/GAME NAME HERE

Next Change To The C Dir:

c:

And Type In The Name Of The Game To Play And Click Enter:

To Download Games: Click Here