Lguest Reviews in 2025

Audience

Developers and IT departments interested in a solution to run multiple copies of the same 32-bit kernel

About Lguest

Lguest allows you to run multiple copies of the same 32-bit kernel, simply modprobe lg, then run Documentation/lguest/lguest to create a new guest. I suggest you try this yourself, lguest is incredibly easy to get up and running. It's also quite useful: I can test-boot kernels with it in less than a second, or about 10x faster than basic qemu, and 100x faster than a real boot. And as it uses a pty as console, you can do things like pipe it through grep. lguest is all one big kernel patch, including the launcher. It's in 2.6.23-git13 and above. Lguest aims to isolate the guest so it cannot reach outside to the host (except for virtual devices supplied by the host of course), even if the guest is malicious. However, a malicious guest kernel can currently pin host memory (up to the amount of memory allowed to the guest). Most images are set up to create a console virtual consoles (/dev/tty0 etc), but the lguest console is /dev/hvc0.

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Integrations

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features 0.0 / 5

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support 0.0 / 5

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Product Details

Platforms Supported

Linux

Training

Documentation

Support

Online

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