XMNetSpeed

#!/usr/bin/env zsh
while true; do
    ORX=`cat /sys/class/net/enp3s0/statistics/rx_bytes`
    OTX=`cat /sys/class/net/enp3s0/statistics/tx_bytes`
    sleep 1
    NRX=`cat /sys/class/net/enp3s0/statistics/rx_bytes`
    NTX=`cat /sys/class/net/enp3s0/statistics/tx_bytes`
    TRX=`echo "scale=2; ($NRX-$ORX)" | bc -l`
    TTX=`echo "scale=2; ($NTX-$OTX)" | bc -l`

    if [ $TRX -gt 1048576 ]; then
        RX=`echo "scale=2; ($TRX/1048576)" | bc -l`"MB/s"
    elif [ $TRX -gt 1024 ]; then
        RX=`echo "scale=2; ($TRX/1024)" | bc -l`"KB/s"
    else
        RX=$TRX"B/s"
    fi

    if [ $TTX -gt 1048576 ]; then
        TX=`echo "scale=2; ($TTX/1048576)" | bc -l`"MB/s"
    elif [ $TTX -gt 1024 ]; then
        TX=`echo "scale=2; ($TTX/1024)" | bc -l`"KB/s"
    else
        TX=$TTX"B/s"
    fi

    echo $RX $TX
done