Physical to virtual GNU/Linux P2V

#!/bin/bash

# Physical to Virtual GNU/Linux
# @ Paolo Pedaletti 2013-02-16
# http://pedalinux.blogspot.it/2013/02/physical-to-virtual-step-by-step.html
# this is free software
#

# change this when you have done:
DEBUG=""
DEBUG="echo "

ROOTSIZEGB="20"
ROOTSIZEB=$((ROOTSIZEGB * 1024 * 1024 * 2))
SWAPSIZEGB="4"
SWAPSIZEB=$((SWAPSIZEGB * 1024 * 1024 * 2))
OFFSET=2048
VDISK=/home/kvm/test/sda.bin
$DEBUG qemu-img create -f raw $VDISK $((ROOTSIZEGB + SWAPSIZEGB))G
CMD="$OFFSET,$ROOTSIZEB,83\n$((ROOTSIZEB + OFFSET)),$((SWAPSIZEB - OFFSET)),82"
echo -e "sfdisk : $CMD"
echo -e "$CMD" | sfdisk -uS $VDISK
$DEBUG sfdisk -l $VDISK
$DEBUG mkdir /mnt/test-sda
$DEBUG losetup --offset $OFFSET /dev/loop1 $VDISK
$DEBUG mkfs.ext4 /dev/loop1
$DEBUG mount /dev/loop1 /mnt/test-sda
$DEBUG cd /mnt/test/sda
echo "clone physical machine:"
$DEBUG rsync -e ssh -au --stats -h --numeric-ids --exclude /proc --exclude /tmp --exclude /sys root@REMOTEHOST:/ /mnt/test-sda/
echo "chroot to VM:"
$DEBUG mount --bind /dev/  /mnt/test-sda/dev/
$DEBUG mount -t devpts pts /mnt/test-sda/dev/pts/
$DEBUG mount -t tmpfs none /mnt/test-sda/dev/shm/
$DEBUG mount -t proc  none /mnt/test-sda/proc/
$DEBUG mount -t sysfs sys  /mnt/test-sda/sys/
$DEBUG chroot /mnt/test/sda
echo "fix mtab and fstab:"
$DEBUG vim /etc/mtab
$DEBUG vim /etc/fstab
echo "rebuild initramdisk:"
$DEBUG mkinitrd ...
echo "install grub:"
$DEBUG grub-install /dev/loop1
echo "umounting virtual image:"
$DEBUG exit
$DEBUG cd ..
$DEBUG umount /mnt/test-sda/sys/
$DEBUG umount /mnt/test-sda/proc/
$DEBUG umount /mnt/test-sda/dev/shm
$DEBUG umount /mnt/test-sda/dev/pts
$DEBUG umount /mnt/test-sda/dev/
$DEBUG umount /mnt/test-sda/
$DEBUG losetup -d /dev/loop1
echo "run virtual machine:"
$DEBUG kvm -m 4096 -cpu kvm32 -name VMclone $VDISK
echo "grub:"
$DEBUG linux /boot/vmlinux... boot=/dev/sda1
$DEBUG initrd /boot/initrd....
$DEBUG boot

echo "All correct?"