net_bw.sh

#!/bin/bash

# 一次向阿里云提交工单反映问题时，对方提供的测试脚本, 嘻嘻, 借用了，比我写的py脚本还方便

if [ -z "$1" ]; then
        echo
        echo usage: $0 network-interface
        echo
        echo e.g. $0 eth1
        echo
        exit
fi
IF=$1
while true
do
        T1=`cat /sys/class/net/$1/statistics/tx_bytes`
	IP1=`iptables -nvxL OUTPUT |grep "0.0.0.0" |awk '{print $2}'`
        sleep 1
        T2=`cat /sys/class/net/$1/statistics/tx_bytes`
	IP2=`iptables -nvxL OUTPUT |grep "0.0.0.0" |awk '{print $2}'`
        TBPS=`expr $T2 - $T1`
        IPPS=`expr $IP2 - $IP1`
        TKBPS=`expr $TBPS / 128`
        IPKBPS=`expr $IPPS / 128`
        echo "tx $TKBPS kb/s"
	echo "txiptables $IPKBPS kb/s"
done