https://thepihut.com/blogs/raspberry-pi-tutorials/how-to-install-the-realtek-rtl8125-2-5g-ethernet-driver-on-ubuntu?srsltid=AfmBOooGJb8Sc3k2x5gR3bfxkXeYAa9Tace47M7JcipCYUn8ZHb12UhV

https://botland.de/gpio-erweiterungen-und-hats-fur-raspberry-pi-4b/19593-power-over-ethernet-hat-d-poe-stromversorgung-und-8023af-netzwerk-fur-raspberry-pi-3b-4b-waveshare-19532-5904422364632.html

https://raspberrystreet.com/learn/how-to-boot-raspberrypi-from-usb-ssd

von Uwe

https://buyzero.de/blogs/news/raspberry-pi-reservation-tool-auf-picockpit

dmesg -T | egrep -i 'killed process'

oom

https://community.home-assistant.io/t/automatic-motorized-water-shut-off-valves/173501/48

https://funprojects.blog/2021/04/26/control-usb-powered-devices/

dd bs=4M if=/dev/sdd of=/mnt/hdd/backup/raspberry-pi/pi4-iptv-`date +%d%m%y`.img
dd bs=4M if=/dev/sdd of=/mnt/hdd/backup/raspberry-pi/pi4-has-`date +%d%m%y`.img

or

dd bs=4M if=/dev/sdb | gzip > /mnt/hdd/backup/raspberry-pi/image`date +%d%m%y`.gz

cat /sys/class/thermal/thermal_zone0/temp

echo ">> CPU Freq:" $(($(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq)/1000))MHz

https://www.raspberrypi.org/forums/viewtopic.php?t=252115