mrlpm/instructions.md

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Ethernet and Wi-Fi mutually exclusive

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instructions.md

Ref.: https://man.archlinux.org/man/nmcli-examples.7.en

Create an script in /etc/NetworkManager/dispatcher.d/

cat << EOF |sudo tee /etc/NetworkManager/dispatcher.d/wifi-ether.sh
#!/bin/bash
export LC_ALL=C
enable_disable_wifi ()
{
    result=$(nmcli dev | grep "ethernet" | grep -w "connected")
    if [ -n "$result" ]; then
        nmcli radio wifi off
    else
        nmcli radio wifi on
    fi
}
if [ "$2" = "up" ]; then
    enable_disable_wifi
fi
if [ "$2" = "down" ]; then
    enable_disable_wifi
fi
EOF

Set execution perms

chmod +x /etc/NetworkManager/dispatcher.d/wifi-ether.sh