post_install() {
    echo "The easiest way to start the two-finger daemon is by running:"
    echo "    twofing --wait /dev/input/xxx"
    echo "where /dev/input/xxx refers to the multitouch input device."
}

post_upgrade() {
    echo "The easiest way to start the two-finger daemon is by running:"
    echo "    twofing --wait /dev/input/xxx"
    echo "where /dev/input/xxx refers to the multitouch input device."
}