用脚本实时显示Linux网络流量

benxiong

ifconfig，会有这样的输出：
          RX bytes:1224128649 (1.1 GiB)  TX bytes:34114947 (32.5 MiB)
过一会再看，数值有所变化，两者的差值就是过去一段时间的流量。可是，这也太不人性化了……
正所谓自己动手，丰衣足食，我们自己来写一个脚本，实时显示并刷新！
脚本如下，还是哪句话，本人功力有限，写脚本的原则是够用就好。
#!/bin/bashif [ -n "$1" ]; then  eth_name=$1else  eth_name="eth0"fii=0send_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_orecv_n=$recv_owhile [ $i -le 100000 ]; do  send_l=$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
该脚本（假设名叫traffic）默认显示eth0的流量，如果你有多个网卡，请将网卡作为参数传进去，比如：
./traffic  eth1
运行结果如下：
file:///C:/DOCUME%7E1/hrw/LOCALS%7E1/Temp/moz-screenshot-2.png

file:///C:/DOCUME%7E1/hrw/LOCALS%7E1/Temp/moz-screenshot.png
file:///C:/DOCUME%7E1/hrw/LOCALS%7E1/Temp/moz-screenshot-1.png


本文来自ChinaUnix博客，如果查看原文请点：http://blog.chinaunix.net/u/22677/showart_2115362.html