监控linux 网络流量

修改了下网上搜索的监控网络流量的脚本

#!/bin/bash

if [ -n "$1" ]; then

eth_name=$1

else

eth_name="eth0"

fi

i=0

send_o=`expr $(ifconfig $eth_name | grep bytes | awk '{print $6}' | awk -F : '{print $2}') / 1024`

recv_o=`expr $(ifconfig $eth_name | grep bytes | awk '{print $2}' | awk -F : '{print $2}') / 1024`

send_n=$send_o

recv_n=$recv_o

while [ 1 ]; do

send_l=$send_n

recv_l=$recv_n

sleep 1

send_n=`expr $(ifconfig $eth_name | grep bytes | awk '{print $6}' | awk -F : '{print $2}') / 1024`

recv_n=`expr $(ifconfig $eth_name | grep bytes | awk '{print $2}' | awk -F : '{print $2}') / 1024`

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=`expr $(ifconfig $eth_name | grep bytes | awk '{print $6}' | awk -F : '{print $2}') / 1024`

recvn=`expr $(ifconfig $eth_name | grep bytes | awk '{print $2}' | awk -F : '{print $2}') / 1024`

clear

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

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

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

done

Last second : Send rate: 5923 KB/sec Recv rate: 62 KB/sec Total rate: 5985 KB/sec

Average value: Send rate: 5727 KB/sec Recv rate: 57 KB/sec Total rate: 5784 KB/sec

Total traffic after startup: Send traffic: 28239166 Recv traffic: 644817