实时查看网络流量的shell脚本

龍子

本文转载自网络，作者轶名，原文链接见于文末。
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实时查看网络流量脚本：　　

• #!/bin/bash
  
• 
  
• if [ -n "$1" ]; then
  
•   eth_name=$1
  
• else
  
•   eth_name="eth0"
  
• fi
  
• 
  
• i=0
  
• 
  
• send_o=`ifconfig $eth_name | grep bytes | awk '{print $6}' | awk -F : '{print $2}'`
  
• recv_o=`ifconfig $eth_name | grep bytes | awk '{print $2}' | awk -F : '{print $2}'`
  
• send_n=$send_o
  
• recv_n=$recv_o
  
• 
  
• while [ $i -le 100000 ]; do
  
•   send_l=$send_n
  
•   recv_l=$recv_n
  
•   sleep 1
  
•   send_n=`ifconfig $eth_name | grep bytes | awk '{print $6}' | awk -F : '{print $2}'`
  
•   recv_n=`ifconfig $eth_name | grep bytes | awk '{print $2}' | awk -F : '{print $2}'`
  
•   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=`ifconfig $eth_name | grep bytes | awk -F \( '{print $3}' | awk -F \) '{print $1}'`
  
•   recvn=`ifconfig $eth_name | grep bytes | awk -F \( '{print $2}' | awk -F \) '{print $1}'`
  
•   clear
  
•   echo  "Last second  :   Send rate: $send_r Bytes/sec  Recv rate: $recv_r Bytes/sec  Total rate: $total_r Bytes/sec"
  
•   echo  "Average value:   Send rate: $send_ra Bytes/sec  Recv rate: $recv_ra Bytes/sec  Total rate: $total_ra Bytes/sec"
  
•   echo  "Total traffic after startup:    Send traffic: $sendn  Recv traffic: $recvn"
  
• done
  

　　

　　原文链接：http://www.linuxeden.com/html/develop/20090808/67255.html