What to do: install ubuntu on the computer hard drive by using wubi, Default System: WIN7 32 bit (Note: it's possible to install the ubuntu12.04 on virtual machine, however, some wired problems may occur when burning the image into the SD card)
Update software source:
# sudo apt-get upgrade # sudo apt-get install update
Install text editor vim:
# sudo apt-get vim
The ARM cross compile tool chain is required for porting kernel, use the following command to install:
# sudo apt-get install gcc-arm-linux-gnueabihf