Deshabilita el wifi del equipo si se conecta el cable de red y lo vuelve a activar al desconectarse

99-disable-lan-on-wire.sh

#!/bin/bash

# copy this script to /etc/NetworkManager/dispatcher.d/99-disable-lan-on-wire.sh
# own by root and set permissions to 700

# eth0, eth1, etc.
LAN_IFACE="enp3s0"

if [[ "${1}" = "${LAN_IFACE}" ]]; then
    case "${2}" in
        up)
            nmcli radio wifi off
            ;;
        down)
            nmcli radio wifi on
            ;;
    esac    
fi