A/Writing an
SD Card Image
This book has mostly concerned itself with the Raspberry Pi OS ,
how to install it, and how to use it. However, as you may remember
from Chapter 3, there are lots of other distributions and operating
systems that can run ont he Pi.
With any distribution, it’s normally just a matter of downloading the
image file and then copying that file to an SD card. This appendix
seeks to do two things: simplify the process of writing a disk im-
age file to an SD card, and also to illustrate the process the other
way around—to create a disk image file from an SD card. This is
extremely helpful if you want to save a working SD card image, for
example, so if you screw up your working Pi you can reinstall your
working backup. It’s