monitor

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#!/bin/bash
cont=1
downi=$(cat /proc/net/dev | grep eth0 | awk '{print $2}')
upi=$(cat /proc/net/dev | grep eth0 | awk '{print $10}')
while [ $cont -le 720 ]
do
sleep 5
downf=$(cat /proc/net/dev | grep eth0 | awk '{print $2}')
upf=$(cat /proc/net/dev | grep eth0 | awk '{print $10}')
downv=$(( ($downf - $downi)/5 ))
upv=$(( ($upf - $upi)/5 ))
echo "$cont $downv $upv" >> monitor.dat
downi=$(cat /proc/net/dev | grep eth0 | awk '{print $2}')
upi=$(cat /proc/net/dev | grep eth0 | awk '{print $10}')
cont=$(($cont + 1))
done