About this Wiki

Welcome to the UserModeLinuxWiki. This is a place to find and collaborate about User-mode Linux (UML). UML lets you run a virtual machine, "a safe, secure way of running Linux versions and Linux processes. Run buggy software, experiment with new Linux kernels or distributions, and poke around in the internals of Linux, all without risking your main Linux setup" (UML )

Important Note - SPAM

To try to keep this wiki free of SPAM, editing is only permitted for authenticated users. If you would like a user id, please email: jfdi (dot) dave (at) googlemail (dot) com, and one will be sent back to you. Please do not abuse this wiki by inserting any inappropriate content.

General Information

• Scenarios describing how UML is (or could) be used
• A Tale Of Two Kernels - why do they keep talking about host and guest kernels?
• Networking - how to hook up UMLs to the world, and to each other.
• Security - notes on UML security issues
  • Chroot - how to chroot a UML
  • SELinux - how to use SELinux with UML (and chroot too)
• Tools - tools for working with UML.
• Troubleshooting - problems & their solutions.
• Performance considerations

Kernels

• Building guest kernels.
• Building nested guest kernels.
• Precompiled kernels
• Building a host kernel with the SKAS patch to make it run faster (optional).
• Naming Convention For UML Patched Kernels

File Systems

• Building root file systems
• Prebuilt root file systems - there are several of these around t'internet.

Developing with UML

• Debugging modules from 'init' and later as well

Other items of interest:

• Articles - UML articles and guides
• Related - other emulators and virtual machines.
• UML Kernel Homepage
• UML Community Site
• Blaisor's Kernel Patches
• Linuxzoo: Free-Access UML machines
• Running Valgrind on UML