====== Ubuntu installation with lvm2 ======

  * create usb:
    dd if=ubuntu.iso of=/dev/sdx bs=2048
  * when inside ubuntu-live, install lvm2 and mount or create vg, lv.
    apt-get install lvm2
    modprobe dm-mod
    partprobe
  * choose file system folders and install ubuntu.
  * chroot to newly created system and install lvm2
<code>
root@ubuntu:/home/ubuntu# mount /dev/vg00/lv_root /mnt/
root@ubuntu:/home/ubuntu# mount /dev/sda1 /mnt/boot
root@ubuntu:/home/ubuntu# mount /dev/vg00/lv_var /mnt/var
root@ubuntu:/home/ubuntu# mount /dev/vg00/lv_tmp /mnt/tmp
root@ubuntu:/home/ubuntu# mount -o bind /dev /mnt/dev
root@ubuntu:/home/ubuntu# mount -o bind /sys /mnt/sys
root@ubuntu:/home/ubuntu# mount -t proc none /mnt/proc
</code> 

===== Install boot loader =====
   * chroot like above.
   * grub-install --force /dev/sda1