CoreELEC or LibreELEC autostart.sh to auto start scripts upon reboot

autostart.sh

# this located in /storage/.config/autostart.sh on a CoreELEC box, run chmod +x to make it executable
# use nohup to run the script in the backgroud
# nohup /storage/freemyip/updateDynDNS.sh &

# use this to run once off tasks
(
        # pause few seconds to wait for network & time services to start
        sleep 5
        DT=$(date +"%m-%d-%Y, %r")
        echo "Box rebooted on $DT, running tasks in autostart.sh" >> /storage/freemyip/DynDNSUpdate.log
        /storage/freemyip/updateDynDNS.sh
) &