centos linux 监控流量脚本

感谢我们的老大leon给我提供的脚本非常方便，而且使用：

[root@localhost local]# vi netflow.sh

#! /bin/bash
while true
do
receive1=`cat /proc/net/dev|grep eth0 | awk '{print$1}'|sed -s 's/eth0://g'`
send1=`cat /proc/net/dev|grep eth0 | awk '{print$9}'`
sleep 1
receive2=`cat /proc/net/dev|grep eth0 | awk '{print$1}'|sed -s 's/eth0://g'`
receive_cnt=`expr $receive2 - $receive1`
receive_cnt=`expr $receive_cnt / 1024`
send2=`cat /proc/net/dev|grep eth0 | awk '{print$9}'`
send_cnt=`expr $send2 - $send1`
send_cnt=`expr $send_cnt / 1024`
total_cnt=`expr $send_cnt + $receive_cnt`
echo $total_cnt
echo  'eth0 Receive Bytes:'$receive_cnt
echo 'eth0 Send Bytes:' $send_cnt
done