linux下监控网络流量的脚本

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我看了下,linux下的/proc/net/dev记录了每块网卡发送和接受的包和字节数。因此萌生想法,写了一个。运行效果:

复制代码

代码如下:

[root@74-82-173-217 ~]# ./net.sh

Current Ip: inet addr:74.82.173.217 Bcast:74.82.173.223 Mask:255.255.255.224

Summry info: RX bytes:203692709 (194.2 MiB) TX bytes:93525930 (89.1 MiB)

eth0 Receive Bytes: 573 Packets: 3

eth0 Send Bytes: 3086 Packets: 3

eth0 Receive Bytes: 378 Packets: 7

eth0 Send Bytes: 11236 Packets: 7

eth0 Receive Bytes: 324 Packets: 6

eth0 Send Bytes: 444 Packets: 2

eth0 Receive Bytes: 54 Packets: 1

eth0 Send Bytes: 0 Packets: 0

具体脚本的内容如下,几乎不需要修改,就可以拿到任何机器上去使用了。

复制代码

代码如下:

[root@74-82-173-217 ~]# cat net.sh

#! /bin/bash

#Author: Vogts WangTao 2008-12-18

#Get summry info

echo “Current Ip: “`/sbin/ifconfig eth0 | grep inet`

echo “Summry info: “`/sbin/ifconfig eth0 | grep bytes`

#sleep 1 second ,monitor eth0

while true

do

receive1=`cat /proc/net/dev|grep eth0 | awk {print$1}|sed -s s/eth0://g`

receive_pack1=`cat /proc/net/dev|grep eth0 | awk {print$2}`

send1=`cat /proc/net/dev|grep eth0 | awk {print$9}`

send_pack1=`cat /proc/net/dev|grep eth0 | awk {print$10}`

sleep 1

receive2=`cat /proc/net/dev|grep eth0 | awk {print$1}|sed -s s/eth0://g`

receive_pack2=`cat /proc/net/dev|grep eth0 | awk {print$2}`

receive_cnt=`expr $receive2 – $receive1`

receive_pack_cnt=`expr $receive_pack2 – $receive_pack1`

send2=`cat /proc/net/dev|grep eth0 | awk {print$9}`

send_pack2=`cat /proc/net/dev|grep eth0 | awk {print$10}`

send_cnt=`expr $send2 – $send1`

send_pack_cnt=`expr $send_pack2 – $send_pack1`

echo eth0 Receive Bytes: $receive_cnt Packets: $receive_pack_cnt

echo eth0 Send Bytes: $send_cnt Packets: $send_pack_cnt

done

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