I can write a "minecraft console" option in very easily. As you'll see, this is just Java running inside Screen. You can connect to the console now with screen -dr and disconnect with Ctrl+a then d. I'll add this in when I get some free time. Writing something to push commands to the server is very easy. Getting the output of those commands back to the terminal I'll have to look into, I'm not sure that's even possible. Do you still think a "minecraft cmd" would be useful if you couldn't get output back to the terminal? If you wanted to see the output of whatever you just ran, you'd have to tail the log file, or connect to "minecraft console".