通过shell 脚本查看服务器的时时流量

network.sh

#!/bin/bash                                                                                                                                  
 
ETH=$1
ETH=${ETH:-eth0}
IP=`ifconfig $ETH|awk -F '[ :]+' '/inet addr/{print $4}'`
 
while true;do
  let I+=1
  NOW=`date +"%F %T"`
  TX1=`ifconfig $ETH|grep bytes|awk -F '[ :]+' '{print $9}'`
  RX1=`ifconfig $ETH|grep bytes|awk -F '[ :]+' '{print $4}'`
  sleep 1
  TX2=`ifconfig $ETH|grep bytes|awk -F '[ :]+' '{print $9}'`
  RX2=`ifconfig $ETH|grep bytes|awk -F '[ :]+' '{print $4}'`
  
  let TX=(TX2-TX1)/1024
  let RX=(RX2-RX1)/1024
  let TX_TOTAL+=$TX
  let RX_TOTAL+=$RX
  let TX_AVERAGE=TX_TOTAL/${I}
  let RX_AVERAGE=RX_TOTAL/${I}
  
  clear
  
  printf "%10s\t%20s\n" "Device $ETH [$IP]" "$NOW"
  echo "============================================================="
  printf "%10s\t%20s\t%20s\n" CURRENT: in:${RX}KB/s out:${TX}KB/s
  printf "%10s\t%20s\t%20s\n" AVERAGE: in:${RX_AVERAGE}KB/s out:${TX_AVERAGE}KB/s
  printf "%10s\t%20s\t%20s\n" TOTAL: in:${RX_TOTAL}KB out:${TX_TOTAL}KB
done