UML 沒有開啟xterm.

Run UML, 然後出現4個xterm，每個都有

Can't find the execpt of port-helper

在 User Mode Linux HOWTO 中 : xterms appear, then immediately disappear.

If you're running an up to date kernel with an old release of uml_utilities,
the port-helper program will not work properly,
so xterms will exit straight after they appear.

The solution is to upgrade to the latest release of uml_utilities.
Usually this problem occurs when you have installed a packaged release of UML then compiled your own development kernel without upgrading the uml_utilities from the source distribution.

原來是缺了port-helper 這個file，是在 /Project/bin 中，但是我有 project 這個folder。
我連 uml_utility 這個package.都沒裝。

這一篇有Debian 上run UML 的說明，雖然有點舊了.. 2004 的。
這一篇也是，比較新的，中文的。