Instructions for downloading and imaging the Raspberry Pi 3 image to a USB drive

chromebook.RPi.image.sh

# This is for a Raspberry Pi 3B+

# To make this work, you will need to be running in developer mode on the Chromebook.
# To enable developer mode, first make a backup of any files, then follow these instrucitons:
#   https://chromium.googlesource.com/chromiumos/docs/+/HEAD/developer_mode.md#dev-mode

# Choosing an image: https://www.raspberrypi.com/software/operating-systems/
# find Images at https://downloads.raspberrypi.org/raspios_lite_armhf/images/
# ctrl+alt+T to open a crosh terminal

# open a shell
shell

# become root
sudo su -

# make target folder
mkdir -p /home/chronos/user/Downloads/raspberry.pi
cd /home/chronos/user/Downloads/raspberry.pi

# download SHA and IMG files
url="https://downloads.raspberrypi.org/raspios_armhf/images/raspios_armhf-2022-09-26/2022-09-22-raspios-bullseye-armhf.img.xz"
image=$( <<< "${url}" rev | cut -d/ -f1 | rev )
curl --progress-bar -L -O -C - "${url}".sha256
curl --progress-bar -L -O -C - "${url}"

# compute SHA of IMG and compare to SHA
{
cat "${image}".sha256
sha256sum "${image}"
} | tee verify.txt

# insert USB disk
# determine which device is USB disk
grep sd /proc/partitions
mount | grep /media/removable/

# unmount USB disk from Files app ( maybe not needed? )

# image to USB device; change sdX to appropriate USB drive
xzcat "${image}" |
dd of=/dev/sdX bs=1M status=progress




# remove USB device, insert into Raspberry Pi, and power it up

RPi.Docker.install.sh

# From: https://www.simplilearn.com/tutorials/docker-tutorial/raspberry-pi-docker

curl -fsSL https://get.docker.com -o get-docker.sh

sudo sh get-docker.sh

sudo usermod -aG docker ${USER}
exec sudo su - ${USER}

docker image pull ubuntu:22.04
docker container run --rm ubuntu:22.04 head -2 /etc/os-release