网络流量监控

#!/bin/bash

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