linux网络流量监控脚本

#!/bin/bash

#要监测的网卡

if [ -n "$1" ]; then

eth_name=$1

else

eth_name="eth0"

fi
i=0
send_o=`ifconfig $eth_name | grep bytes | awk '{print $6}' | awk -F : '{print $2}'`

recv_o=`ifconfig $eth_name | grep bytes | awk '{print $2}' | awk -F : '{print $2}'`

send_n=$send_o

recv_n=$recv_o
while [ $i -le 100000 ]; do

send_l=$send_n

recv_l=$recv_n

sleep 1

send_n=`ifconfig $eth_name | grep bytes | awk '{print $6}' | awk -F : '{print $2}'`

recv_n=`ifconfig $eth_name | grep bytes | awk '{print $2}' | awk -F : '{print $2}'`

i=`expr $i + 1`

send_r=`expr $send_n - $send_l`

recv_r=`expr $recv_n - $recv_l`

total_r=`expr $send_r + $recv_r`

send_ra=`expr \( $send_n - $send_o \) / $i`

recv_ra=`expr \( $recv_n - $recv_o \) / $i`

total_ra=`expr $send_ra + $recv_ra`

sendn=`ifconfig $eth_name | grep bytes | awk -F \( '{print $3}' | awk -F \) '{print $1}'`

recvn=`ifconfig $eth_name | grep bytes | awk -F \( '{print $2}' | awk -F \) '{print $1}'`

clear

echo "Last second : Send rate: $send_r Bytes/sec Recv rate: $recv_r Bytes/sec Total rate: $total_r Bytes/sec"

echo "Average value: Send rate: $send_ra Bytes/sec Recv rate: $recv_ra Bytes/sec Total rate: $total_ra Bytes/sec"

echo "Total traffic after startup: Send traffic: $sendn Recv traffic: $recvn"

done