I'm looking for a theme in which everything is controlled from a command line just like a DOS prompt. Is there anything like this?

Is it even possible?

As far as I know, Litestep's command module can't do commands like copy, md, or even dir. Just bangs and run commands.

very easy way:

add a shortcut to run cmd.exe fullscreen to your startup folder.

That's an interesting idea Urendi.. I'll whip one up, it'll be really simple. Probably won't take me more than a couple days.