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在我们的日常工作当中，监控网络要么使用iptarf,ifstat这些命令实现的，但是需要装额外的RPM包。特别是iptarf装起来麻烦。

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：

root@:/root/wt>sh  aa.sh

Current Ip:   inet addr:10.0.65.52 Bcast:10.0.65.255 Mask:255.255.255.0Summry info:  RX bytes:2424183819 (2311.8 Mb) TX bytes:3519850565 (3356.7 Mb)eth0 Receive Bytes: 61147  Packets: 433eth0 Send Bytes: 86458  Packets: 372eth0 Receive Bytes: 156051  Packets: 924eth0 Send Bytes: 230962  Packets: 877eth0 Receive Bytes: 192537  Packets: 1118eth0 Send Bytes: 283893  Packets: 1073

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。

root@:/root/wt>cat aa.sh

#! /bin/bash#Author: Vogts WangTao 2008-12-18#Get summry infoecho “Current Ip:  “`/sbin/ifconfig eth0 | grep inet`echo “Summry info: “`/sbin/ifconfig eth0 | grep bytes`#sleep 1 second ,monitor eth0while truedoreceive1=`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 1receive2=`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_cntecho ‘eth0 Send Bytes:’ $send_cnt ‘ Packets:’ $send_pack_cntdone

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