Terminus is what you think it is, a game with a purpose of teaching you to use the command line in linux or unix.
The command line is the advanced interface that allows you to do a whole lot of work without the need for graphical interface widgets, like windows, buttons and the like.
Lots of tasks can be completed using the command line and are you using linux or unix or even OS X, you should know your way around in the terminal.
So, open your GUI browser and head over to http://www.mprat.org/Terminus/
Look at your surroundings with the command “ls”. Move to a new location with the command “cd LOCATION” You can backtrack with the command “cd ..”. Interact with things in the world with the command “less ITEM” If you forget where you are, type “pwd”