The Linux Journal has reprinted an introductory chapter on user-mode Linux
from Steve Best's book Linux Debugging and Performance Tuning
. "Each UML instance is a complete virtual machine that's all but indistinguishable from a real computer. All of them run as a normal user on the host. They give you root-level access, the ability to start daemons, the ability to run text and graphical applications, full networking, and almost all of the other capabilities of a Linux system.
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