linux流量監控腳本

#!/bin/bash

#

while [ -e /etc/inittab ];do

R1=`cat /sys/class/net/eth0/statistics/rx_bytes`

T1=`cat /sys/class/net/eth0/statistics/tx_bytes`

sleep 1

R2=`cat /sys/class/net/eth0/statistics/rx_bytes`

T2=`cat /sys/class/net/eth0/statistics/tx_bytes`

TBPS=`expr $T2 - $T1`

RBPS=`expr $R2 - $R1`

TKBPS=`expr $TBPS / 1024`

RKBPS=`expr $RBPS / 1024`

echo "上傳速率 eth0: $TKBPS kb/s 下載速率 eth0: $RKBPS kb/s at $(date +%Y%m%d%H:%M:%S)"

done