Debian 11¶
Download the Debian 11.4 unofficial non-free from here
I prefer the Mate Desktop Environment
Burning ISO to a SD card or USB Stick
Open a terminal (Ctrl Alt t) and check what devices are installed before plugging in the SD card or USB stick.
sudo fdisk -l

Plug in the SD card or USB stick and run fdisk again to find out the device name of the SD card or USB stick.
sudo fdisk -l

In my case you can see the Micro SD card is /dev/sda
Open a terminal in the directory where the ISO file is and list the files and get the path using the following
cd Downloads
pwd
ls -1

Now burn the ISO to the SD card or USB stick using dd.
sudo dd if=full/path/to/iso/file of=/dev/sd? bs=8192 status=progress
sudo dd if=/home/john/Downloads/debian-live-11.4.0-amd64-mate+nonfree.iso of=/dev/sda bs=8192 status=progress

When dd is done you get this

Boot up to the SD card or USB stick and select Graphical Install.
DO NOT enter a root password, just pass it by. If you do you can’t use the sudo command to do root things.
After booting up open a terminal (Ctrl Alt t) and update everything
sudo apt update
sudo apt dist-upgrade
sudo apt autoremove
sudo apt clean
To blank a SD card
sudo dd if=/dev/zero of=/dev/sda bs=8192 status=progress