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while true; do
    RX1=$(cat /sys/class/net/enp65s0f0/statistics/rx_bytes)
    TX1=$(cat /sys/class/net/enp65s0f0/statistics/tx_bytes)

    sleep 1

    RX2=$(cat /sys/class/net/enp65s0f0/statistics/rx_bytes)
    TX2=$(cat /sys/class/net/enp65s0f0/statistics/tx_bytes)

    RX_BYTES=$((RX2 - RX1))
    TX_BYTES=$((TX2 - TX1))

    RX_BITS=$((RX_BYTES * 8))
    TX_BITS=$((TX_BYTES * 8))

    RX_GB=$(echo "scale=2; $RX_BYTES / 1024 / 1024 / 1024" | bc)
    TX_GB=$(echo "scale=2; $TX_BYTES / 1024 / 1024 / 1024" | bc)

    RX_GBIT=$(echo "scale=2; $RX_BITS / 1024 / 1024 / 1024" | bc)
    TX_GBIT=$(echo "scale=2; $TX_BITS / 1024 / 1024 / 1024" | bc)

    clear

    echo "Receive:"
    echo "  $RX_GB GBytes/second"
    echo "  $RX_GBIT GBits/second"

    echo

    echo "Transmit:"
    echo "  $TX_GB GBytes/second"
    echo "  $TX_GBIT GBits/second"
done