Ubuntu for Sunxi:
------------------
Host OS: Ubuntu
Target: sunxi
assumprion: kernel + script.bin ready to go


##### STAGE 1 #####

sudo debootstrap --arch=armel --foreign precise ubuntu/ http://archive.ubuntu.com/ubuntu/
(cd ubuntu ;  tar jcf ../ubuntu_debootstrat_armel.tar.bz2 .)

#creating ext4 on sd partition 2
mkfs.ext4 /dev/sdc2
mount /dev/sdc2 /mnt

#extract the rootfs to sd
tar jxf ubuntu_debootstrat_armel.tar.bz2 -C /mnt/

#add some tewaks
cd /mnt
echo "proc /proc proc none 0 0" >>etc/fstab
echo "ubuntu-sunxi" > etc/hostname

sync




##### STAGE 2 #####

#now put sd in machine and stop in uboot
in uboot make sure kernal args include:
rootfs=ext4 init=/bin/sh
#with a command like: setenv extraargs "rootfs=ext4 init=/bin/sh"

#boot the kernel
#After the kernel is bootet you should be in bin/sh #:
#in console type:

mount /proc /proc -t proc
export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
#start the 2nd stage deboostrapping, grabb some coffee as this will take a while
/debootstrap/debootstrap --second-stage

#at the end: I: Base system installed successfully.



##### STAGE 3 - Optimization #####

#after this is completed
printf "T0:123:respawn:/sbin/getty 115200 ttyS0\n" >>etc/inittab
#define your new password
passwd


rm /etc/init/tty2.conf
rm /etc/init/tty3.conf
rm /etc/init/tty4.conf
rm /etc/init/tty5.conf
rm /etc/init/tty6.conf

vi /etc/init/tty1.conf
and modify to:
------------------------------------------------------
# ttyS0 - getty
#
# This service maintains a getty on ttyS0 from the point the system is
# started until it is shut down again.

start on stopped rc RUNLEVEL=[2345] and (
            not-container or
            container CONTAINER=lxc or
            container CONTAINER=lxc-libvirt)

stop on runlevel [!2345]

respawn
------------------------------------------------------



sync

#now restart the system
in uboot make sure your kernel args contain
rootfs=ext4 init=/sbin/init
#with a command like: setenv extraargs "rootfs=ext4 init=/sbin/init"




#Done








evola:
Ubuntu 12.04 LTS ubuntu-sunxi ttyS0

ubuntu-sunxi login: root
Password:
Welcome to Ubuntu 12.04 LTS (GNU/Linux 3.4.43+ armv7l)

 * Documentation:  https://help.ubuntu.com/

The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.

root@ubuntu-sunxi:~# uname -r
3.4.43+