測試網卡流量shell腳本

#!/bin/bash

function usage

{

        echo "use ./test_net.sh ethX time"

        echo "$1 is you network interface "

        echo "$2 is the last time!"

        echo "for example: ./test_net.sh eth0 2"

        exit 100

}

if [ $# -lt 2 -o $# -gt 2 ];then

        usage

fi

eth=$1

time=$2

old_inbw=`cat /proc/net/dev | grep $eth | awk -F'[: ]+' '{print $3}'`

old_outbw=`cat /proc/net/dev | grep $eth | awk -F'[: ]+' '{print $11}'`

while true

do

        sleep $time

        new_inbw=`cat /proc/net/dev | grep $eth | awk -F'[: ]+' '{print $3}'`

        new_outbw=`cat /proc/net/dev | grep $eth | awk -F'[: ]+' '{print $11}'`

        inbw=`expr $((($new_inbw-$old_inbw)/$time))`

        outbw=`expr $((($new_outbw-$old_outbw)/$time))`

        echo "$eth: IN:$inbw bytes  OUT:$outbw bytes"

        old_inbw=${new_inbw}

        old_outbw=${new_outbw}

done

exit 0

# ./test_network.sh  eth0 2