测量网卡流量的脚本

#!/bin/bash

# test network width

function usage

{

       echo "Usage: $0 "

       echo "    e.g. $0 eth0"

       exit 65

}

if [ $# -lt 1 ];then

usage

fi

typeset in in_old dif_in

typeset out out_old dif_out

typeset timer

typeset eth

eth=$1

timer=1

in_old=$(cat /proc/net/dev | grep "$eth:" | sed -e "s/\(.*\)\:\(.*\)/\2/g" | awk ' { print $1 }' )

out_old=$(cat /proc/net/dev | grep "$eth:" | sed -e "s/\(.*\)\:\(.*\)/\2/g" |  awk ' { print $9 }' )

       sleep  ${timer}

       in=$(cat /proc/net/dev | grep "$eth:" |  sed -e "s/\(.*\)\:\(.*\)/\2/g" | awk ' { print $1 }' )

       out=$(cat /proc/net/dev | grep "$eth:" |  sed -e "s/\(.*\)\:\(.*\)/\2/g" | awk ' { print $9 }' )

       dif_in=$(((in-in_old)/timer/1024))

       dif_out=$(((out-out_old)/timer/1024))

       echo "IN: ${dif_in} KByte/s   OUT: ${dif_out} KByte/s"

       in_old=${in}

       out_old=${out}

exit 0