tar2vm.sh ../libguestfs-1.0.10.tar.gz /tmp/test.img 10M
alloc /tmp/test.img 10M
run
sfdisk /dev/sda 0 0 0 ,
mkfs ext3 /dev/sda1
mount /dev/sda1 /
tgz-in ../libguestfs-1.0.10.tar.gz /
umount-all