#!/bin/sh
###統計周期内的平均上傳下載下傳速度,以Mb為機關
if [ -z "$1" -o -z "$2" ];then
echo -e "\nUsage: $0 <if> <cycle> eg:$0 eth0 5\n"
exit -
fi
echo -e "\nMonitoring the $1 net flow,press \"ctrl+c\" to stop"
echo ----------------------------------------------------------
while true
do
RX_bytes=`cat /proc/net/dev|grep "$1"|awk '{print $2}'`
TX_bytes=`cat /proc/net/dev|grep "$1"|awk '{print $10}'`
sleep $2
RX_bytes_later=`cat /proc/net/dev|grep "$1"|awk '{print $2}'`
TX_bytes_later=`cat /proc/net/dev|grep "$1"|awk '{print $10}'`
#Mb=B*8/1024/1024
speed_RX=`echo $(expr "scale=2;($RX_bytes_later - $RX_bytes)*8/1024/1024/$2"|bc)`
speed_TX=`echo $(expr "scale=2;($TX_bytes_later - $TX_bytes)*8/1024/1024/$2"|bc)`
printf "Download: %.2f Mb/s\tUpload: %.2f Mb/s\n" $speed_RX $speed_TX
done
使用示例:
./net_flow eth0 5 #監測網卡eth0的速度,每隔5s更新一次資料