Raspberry Pi OS von Buster auf Bullseye auf Bookworm

# Buster to Bullseye
1. sudo apt update
2. sudo apt dist-upgrade -y
3. sudo rpi-update
4. sudo reboot
5. sudo nano /etc/apt/sources.list
# Suche diese Zeile:
deb http://raspbian.raspberrypi.org/raspbian/ buster main contrib non-free rpi
# .. und ersetze sie durch diese ('buster' durch 'bullseye' ersetzen):
deb http://raspbian.raspberrypi.org/raspbian/ bullseye main contrib non-free rpi
6. sudo apt update
7. sudo apt dist-upgrade
8. sudo apt autoclean
9. sudo reboot

# Bullseye to Bookworm
10. sudo apt update
11. sudo apt dist-upgrade -y
12. sudo rpi-update
13. sudo reboot
14. sudo nano /etc/apt/sources.list
# Suche diese Zeile:
deb http://raspbian.raspberrypi.org/raspbian/ bullseye main contrib non-free rpi
# .. und ersetze sie durch diese ('bullseye' durch 'bookworm' ersetzen):
deb http://raspbian.raspberrypi.org/raspbian/ bookworm main contrib non-free rpi
15. sudo apt update
16. sudo apt dist-upgrade
17. sudo apt autoclean
18. sudo reboot