Install CompuLab Ubuntu 12.04 on USB

wget http://compulab.co.il/utilite-computer/download/utilite/installer/cl-installer_utilite-2_kernel-6.3_2014-12-17.img.xz
unxz cl-installer_utilite-2_kernel-6.3_2014-12-17.img.xz
sudo apt install kpartx
sudo kpartx -g -a -v cl-installer_utilite-2_kernel-6.3_2014-12-17.img
sudo mount /dev/mapper/loop1p2 /mnt
sudo mount /dev/mapper/loop1p1 /mnt/boot/
sudo fdisk /dev/sdb
sudo mkfs.ext4 -O ^has_journal -b 4096 -L precise /dev/sdb1
sudo mount /dev/sdb1 /media/usb/
cd /mnt
sudo find . | sudo cpio -dump /media/usb/
sudo umount /mnt/boot/
cd ..
sudo umount /mnt/
cd /media/usb/boot
sudo mkdir -p conf.d/default
cd conf.d/default/
sudo ln -s ../.. kernel