请问 usermode-linux 需要的 DISPLAY 环境变量是什么?

curtis

http://www.gentoo.org/doc/en/uml.xml

User-mode linux uses xterms for the virtual consoles that are run at boot time, so you need to make sure that the terminal from which you run user-mode linux has $DISPLAY properly set (along with proper xhost/xauth permissions).

$DISPLAY  不明白