显然办法是有的，比如，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/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 |
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：
