Linux 查看网络流量实现代码 转
在GUI下面，有一大把的工具可以显示网络流量，那么，命令行下面怎么办？显然办法是有的，比如，ifconfig，Linux 查看网络流量会有这样的输出：
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Linux 查看网络流量脚本，实时显示并刷新！
Linux 查看网络流量脚本如下，还是哪句话，本人功力有限，写脚本的原则是够用就好。
?
- #!/bin/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?? “T
