Do your killer apps spend too much time killing each other? Ever wish you had a place to let your Linux applications run wild — where they wouldn't hurt anything else? Originally conceived as a kernel developer's tool, User-Mode Linux (UML) lets you set up multiple virtual machines that are isolated from each other and from the hardware. Now, you can test applications all the way to failure without breaking the host system — or even requiring a reboot. Carla Schroder shows you how, in this article on IBM's developerWorks website.

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