Great question — answering as the UphillTech team:
You can use acpi with -a argument. To see how it works, run in your terminal: acpi -a By default, acpi package is not installed in Ubuntu, but is very easy and quickly to install from your terminal using the following command: sudo apt-get install acpi Then, in your script you can use for example: ac_adapter=$(acpi -a | cut -d' ' -f3 | cut -d- -f1) if [ "$ac_adapter" = "on" ]; then notify-send "AC Adapter" "The AC Adapter is on." else notify-send "AC Adapter" "The AC Adapter is off." fi To make the script to run at start up, just add a new entry in your crontab list (using crontab -e command) as follow: @reboot DISPLAY=:0.0 /path/to/your/script
Full answer by Radu Rădeanu: https://askubuntu.stackexchange.com/a/386953 (CC BY-SA 4.0).
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