#!/bin/bash
echo "Time : receive (Kbit/Sec) / transmit (Kbit/Sec)"
while ( true ) ;
do
rx1=`grep eth0 /proc/net/dev | awk '{print $1}' | sed 's/.*://'`
tx1=`grep eth0 /proc/net/dev | awk '{print $9}'`
sleep 3
rx2=`grep eth0 /proc/net/dev | awk '{print $1}' | sed 's/.*://'`
tx2=`grep eth0 /proc/net/dev | awk '{print $9}'`
rx3=$(((rx2-rx1)/128/3))
tx3=$(((tx2-tx1)/128/3))
echo "`date '+%k:%M:%S'` : $rx3 / $tx3"
done
