How do I mount a Ubuntu initrd.img?

Question

There is a bug with Ubuntu 10.04 Kernel updates (-31,-32) and I want to mount the initrd.img so I can compare the kernel images and see which modules are missing.

I have already tried -o loop with no success. Anyone have any advice?

Answer 1

The initrd (technically initramfs) is a compressed CPIO archive. You can use the cpio command to manipulate it.

For example: zcat initramfs|cpio -tiv will list the files in the archive.