#!/bin/bash
Eno=`/sbin/ifconfig | /usr/bin/head -n 1 | /usr/bin/tail -n 1 | awk '{print $1}' | sed 's/://g'`
echo "Time : receive (Kbit/Sec) / transmit (Kbit/Sec)"
while ( true ) ;
do
rx1=`grep $Eno /proc/net/dev | awk '{print $1}' | sed 's/://g'`
tx1=`grep $Eno /proc/net/dev | awk '{print $9}'`
sleep 3
rx3=$(((rx1)/128/3))
tx3=$(((tx1)/128/3))
echo "`date '+%k:%M:%S'` : $rx3 / $tx3"
done
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