How to edit board configurations and definitions in the official Debian Linux?
Changing script.bin file without removing the microSD card
The tools for script.bin changing are located in /opt/sunxi-tools directory:
# cd /opt/sunxi-tools
This will convert script.bin file from sdcard to script.fex file and the file will be opened using nano editor.
Now you can change the board modules and parameters, save the changes ("CTRL"+"X"; confirm with "Y") and exit ("CTRL"+"X" again) from nano editor.
this will convert script.fex to script.bin and the script.bin file will be written to sdcard.
Reboot the board and the new settings would be enabled.
Changing script.bin file by removing the microSD card
The biggest part of the board configuration might be edited, changed or improved in a file called script.bin
The script.bin file can usually be found in the main directory of a microSD card prepared with official Debian image. The folder containing the script can be inspected under both Windows, Linux or Mac.
You can't directly edit binary file so you would need to convert it to text format (it is called fex in this case), then edit the parameters via a text editor and finally switch it back to binary format.
The different options for the script are explained here: SUNXI FEX GUIDE
IMPORTANT! ADJUSTING SCRIPT.BIN WITH IMPROPER VALUES MIGHT BREAK YOUR DEBIAN IMAGE AND IT IS ALWAYS RECOMMENDED TO KEEP A BACK-UP OF YOUR DEFAULT SCRIPT.BIN
To convert back and forth the script.bin you might use different tools. You can find Windows tools here: SUNXI TOOLS FOR WINDOWS . For Linux convertors please check the sunxi tools here: SUNXI TOOLS
Note that it is possible to change the script.bin in a running Debian image in newest releases! More information might be found at the top of this wiki article! Not all releases feature the live method of changing fex to bin so if you board doesn't have it follow the offline method.