else
        eth_name="eth0"
fi
i=0
send_o=`ifconfig $eth_name | grep bytes | awk '{print $6}' | awk -F : '{print $2}'`
recv_o=`ifconfig $eth_name | grep bytes | awk '{print $2}' | awk -F : '{print $2}'`
send_n=$send_o
recv_n=$recv_o
while [ $i -ne 0 ]; do
        send_l=$send_n
        recv_l=$recv_n
        sleep 1
        send_n=`ifconfig $eth_name | grep bytes |awk '{print $6}' | awk -F : '{print $2}'`
        recv_n=`ifconfig $eth_name | grep bytes |awk '{print $2}' | awk -F : '{print $2}'`
        i=$(($i + 1))
        send_r=$(($send_n - $send_l))
        recv_r=$(($recv_n - $recv_l))
        total_r=$(($send_r + $recv_r))
        send_ra=$(($(($send_n - $send_o)) / $i))
        recv_ra=$(($(($recv_n - $recv_o)) / $i))
        total_ra=$(($send_ra + $recv_ra))
        sendn=`ifconfig $eth_name | grep bytes |awk -F \( '{print $3}' | awk -F \) '{print $1}'`
        recvn=`ifconfig $eth_name | grep bytes |awk -F \( '{print $2}' | awk -F \) '{print $1}'`
        clear
        echo  "Last second :Send rate: $send_r Bytes/sec Recv rate: $recv_r Bytes/sec  Total rate: $total_r Bytes/sec"
        echo  "Average value:Send rate: $send_ra Bytes/sec Recv rate: $recv_ra Bytes/sec  Total rate: $total_ra Bytes/sec"
        echo  "Total traffic after startup: Send traffic: $sendn  Recv traffic: $recvn"
done