1This document describes one way to create the rcu-test-image file 2that contains the filesystem used by the guest-OS kernel. There are 3probably much better ways of doing this, and this filesystem could no 4doubt be smaller. It is probably also possible to simply download 5an appropriate image from any number of places. 6 7That said, here are the commands: 8 9------------------------------------------------------------------------ 10dd if=/dev/zero of=rcu-test-image bs=400M count=1 11mkfs.ext3 ./rcu-test-image 12sudo mount -o loop ./rcu-test-image /mnt 13 14# Replace "precise" below with your favorite Ubuntu release. 15# Empirical evidence says this image will work for 64-bit, but... 16# Note that debootstrap does take a few minutes to run. Or longer. 17sudo debootstrap --verbose --arch i386 precise /mnt http://archive.ubuntu.com/ubuntu 18cat << '___EOF___' | sudo dd of=/mnt/etc/fstab 19# UNCONFIGURED FSTAB FOR BASE SYSTEM 20# 21/dev/vda / ext3 defaults 1 1 22dev /dev tmpfs rw 0 0 23tmpfs /dev/shm tmpfs defaults 0 0 24devpts /dev/pts devpts gid=5,mode=620 0 0 25sysfs /sys sysfs defaults 0 0 26proc /proc proc defaults 0 0 27___EOF___ 28sudo umount /mnt 29------------------------------------------------------------------------ 30 31 32References: 33 34 http://sripathikodi.blogspot.com/2010/02/creating-kvm-bootable-fedora-system.html 35 https://help.ubuntu.com/community/KVM/CreateGuests 36 https://help.ubuntu.com/community/JeOSVMBuilder 37 http://wiki.libvirt.org/page/UbuntuKVMWalkthrough 38 http://www.moe.co.uk/2011/01/07/pci_add_option_rom-failed-to-find-romfile-pxe-rtl8139-bin/ -- "apt-get install kvm-pxe" 39 http://www.landley.net/writing/rootfs-howto.html 40 http://en.wikipedia.org/wiki/Initrd 41 http://en.wikipedia.org/wiki/Cpio 42 http://wiki.libvirt.org/page/UbuntuKVMWalkthrough 43