readme - add some explanations

README.md

@@ -35,12 +35,18 @@ sudo docker run --privileged -i -t -v $(pwd)/olinux/:/olinux/ debian/olinux sh .
 
 ## Setup SD card device
 
+Find your device card (with dmesg for instance) and put it in a variable.
+
+
 ```shell
 mmc=/dev/sdc
 ```
 
 ## Partitioning
 
+Make 2 partitions; one for boot files (kernel, file with custom boot args...),
+and another for root fs. 
+
 ```shell
 parted -s ${mmc} mklabel msdos
 parted -a optimal ${mmc} mkpart primary fat32 1 16MiB
@@ -51,20 +57,23 @@ mkfs.ext4 ${mmc}2
 
 ## Installation
 
-
 ### Boot partition
 
+Make SD card bootable, add kernel your previously builded and file with
+motherboard paramaters.
+
 ```shell
 mkdir -p /media/usb
 dd if=olinux/sunxi/u-boot-sunxi/u-boot-sunxi-with-spl.bin of=${mmc} bs=1024 seek=8
 mount ${mmc}1 /media/usb/
-cp olinux/sunxi/script.bin /media/usb/
 cp olinux/sunxi/linux-sunxi/arch/arm/boot/uImage /media/usb/
+cp olinux/sunxi/script.bin /media/usb/
 ```
 
 If you want to do a server without graphical session, you can disable allocated
-ram for graphical card. To do that copy uEnv.txt; This file add custom kernel
-parameters to save 32MB of ram.
+ram for the graphical card. To do that copy uEnv.txt file; This file add custom
+kernel parameters to save 32MB of ram. If you want to use the graphical card;
+don't copy uEnv.txt file.
 
 ```shell
 cp olinux/sunxi/uEnv.txt /media/usb/
@@ -73,6 +82,9 @@ umount /media/usb
 
 ### Root partition
 
+Copy the rootfs you previously builded with debootstrap, and add firmware and
+modules build with sunxi kernel.
+
 ```shell
 mount ${mmc}2 /media/usb/
 cp -r olinux/debootstrap/* /media/usb/
@@ -86,6 +98,8 @@ sync
 umount /media/usb
 ```
 
+That's it ! 
+
 # TODO
 
 - change _Install on a SD card_ to a script ?
@@ -97,7 +111,8 @@ umount /media/usb
 - Because it's quick and easy; tutorial [here](http://www.aossama.com/build-debian-docker-image-from-scratch/)
 - Because you shoudn't trust regitry images; demonstration [here](https://joeyh.name/blog/entry/docker_run_debian/) 
 
-# External links 
+## External links 
+
 - [how-to-create-bare-minimum-debian-wheezy-rootfs-from-scratch](http://olimex.wordpress.com/2014/07/21/how-to-create-bare-minimum-debian-wheezy-rootfs-from-scratch/)
 - [building-a-pure-debian-armhf-rootfs](http://blog.night-shade.org.uk/2013/12/building-a-pure-debian-armhf-rootfs/)
 - [Run-ARM-Binaries-in-Your-Docker-Container-Using-Boot2Docker](http://www.hnwatcher.com/r/1526487/Run-ARM-Binaries-in-Your-Docker-Container-Using-Boot2Docker)