脚本实现监控网卡流量【转载】

#!/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

默认是etho0，可带网卡名运行：

csoracle:~ # sh cs.sh eth0

Last second : Send rate: 628 Bytes/sec Recv rate: 288 Bytes/sec Total rate: 916 Bytes/sec

Average value: Send rate: 471 Bytes/sec Recv rate: 138 Bytes/sec Total rate: 609 Bytes/sec

Total traffic after startup: Send traffic: 29.3 Mb Recv traffic: 68.4 Mb