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:255.255.255.0
Summry info:  RX bytes:2424183819 (2311.8 Mb) TX bytes:3519850565 (3356.7 Mb)
eth0 Receive Bytes: 61147  Packets: 433
eth0 Send Bytes: 86458  Packets: 372
eth0 Receive Bytes: 156051  Packets: 924
eth0 Send Bytes: 230962  Packets: 877
eth0 Receive Bytes: 192537  Packets: 1118
eth0 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 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

• 

  iftop 简单易用

  chancey @ December 18, 2008 |

• 

  linux下面还有以下两种方法:
  1.采用snmp获取：
  如snmpwalk -v2c -c public 127.0.0.1 .1.3.6.1.2.1.31.1.1.1.10
  2.采用ifconfig命令取
  如ifconfig eth0 |grep “TX bytes” |awk ‘{print $6}’ |cut -c 7-
  当然两次取值相减再除以时间间隔就是网络流量

  logzgh @ December 28, 2008 |

• 

  同意楼上两位～～·

  vogts @ January 5, 2009 |

• 

  不错，学习了，THKS！

  ochef @ March 18, 2009 |