Wisdom is the prime thing

Recently I gave VirtualBox a spin. It was recently opened under the GPL license, and I wanted to see how it compared to QEMU. Since version 0.9.0 I have had a hard time getting the kqemu module to provide the significant speedup I grew accustomed to. It’s been far too slow to be usable.

Here’s how I converted my QEMU image to a VirtualBox .vdi file. So far I’ve been very pleased with the results.

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Here is my functional setup for qemu. It uses bridging for network connectivity. For this to work, you need the open-source bridge-utils package, the uml_utilities package (for tunctl), as well as qemu and kqemu (duh).

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qemu is an open-source emulator. Thanks to it, I haven’t run Windows natively in a long time at home or at work.

After a kernel upgrade some time ago, networking no longer worked. Here is the error message that I would get when running qemu as a non-root user:

warning: could not configure /dev/net/tun: no virtual network emulation
Could not initialize device 'tap'

The only way I could get it to run was with sudo. Well, today I found the reason and the solution.

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