Section #9. User Mode Linux
User Mode Linux (UML), hosted at http://user-mode-linux.sourceforge.net/, lets you debug the kernel without “oops”ing the machine. To accomplish this, an instance of the kernel (called the guest kernel) runs as a user mode process over the running kernel (called the host kernel).
UML has diverse users. It can function as an environment for testing kernel and application code, a vehicle to experiment with unstable kernels, a secure pseudo computer for hosting services such as web servers, or a tool to learn Linux internals. UML is more useful for debugging hardware-independent portions of the kernel than for device driver debugging.
Get Debugging Linux Systems now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
