使用shell脚本计算Linux网卡流量，方法中最关键点：

复制代码 代码如下:

ifconfig $eth_name | grep bytes | awk '{print $6}' | awk -F : '{print $2}'

通过ifconfig eth0|grep bytes 得到输入输出的流量。

复制代码 代码如下:

/@rac2=>dd2$ifconfig eth0|grep bytes

RX bytes:1638005313300 (1.4 TiB) TX bytes:3408060482049 (3.0 TiB)

再将结果通过awk 得出所要的字段值。

固定时间得到这些值，在写个循环计算一下就能得到网卡流量。

完整代码：

代码一：

#!/bin/bash # 统计网卡流量 # link：www.jb51.net # date：2013/2/26 n=10 date rm -rf /tmp/ifconfig_log while (( $n >= 0 )) do n=$(($n - 1)); date >> /tmp/ifconfig_log ifconfig eth1 >> /tmp/ifconfig_log sleep 1 done grep "RX bytes:" /tmp/ifconfig_log | awk -F"[:| ]" '{print $13}' | awk 'BEGIN{tmp=$1}{if(FNR > 1)print $1-tmp}{tmp=$1}'

代码二：

#!/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 "==================================================" 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" echo "==================================================" done

代码三：

#!/bin/bash # Link: www.51bbo.com ### while : do Time=`date +%F” “%T.%N` rx_before=`ifconfig eth0 |sed -n 8p |awk ‘{print $2}'| cut -c7-` tx_before=`ifconfig eth0 |sed -n 8p |awk ‘{print $6}'| cut -c7-` sleep 2 rx_after=`ifconfig eth0 |sed -n 8p |awk ‘{print $2}'| cut -c7-` tx_after=`ifconfig eth0 |sed -n 8p |awk ‘{print $6}'| cut -c7-` rx_result=$[(rx_after – rx_before)/512] tx_result=$[(tx_after – tx_before)/512] echo -e “$Time nNow_In_Speed: ‘$rx_result'Kbps Now_OUt_Speed: ‘$tx_result'Kbpsn” done