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linux查看端口流量的脚本

  • 2023-11-28 05:11:17
  • 来源:未知
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  通过本脚本,发现bash确实在算术运算方面比老的shell要强大,为此需要开始学习bash,以利用它强大的功能。不过bash中的for语句功能和c中差异比较大。

  # cat stream

  #! /bin/bash

  # Write by Neil.xu qq:37391319 email: xurongzhong@gmail.com

  # 2008-8-19 we need to monitor streams of LTS channels, so write this script

  typeset in in_old dif_in dif_in1 dif_out1

  typeset out out_old dif_out

  in_old=$(cat /proc/net/dev | grep eth0 | sed 's=^.*:==' | awk '{ print $1 }' )

  out_old=$(cat /proc/net/dev | grep eth0 | sed 's=^.*:==' | awk '{ print $9 }')

  while true

  do

  sleep 1

  in=$(cat /proc/net/dev | grep eth0 | sed 's=^.*:==' | awk '{ print $1 }')

  out=$(cat /proc/net/dev | grep eth0 | sed 's=^.*:==' | awk '{ print $9 }')

  dif_in=$((in-in_old))

  dif_in1=$((dif_in * 8 / 1024 / 1024 ))

  dif_out=$((out-out_old))

  echo “ IN: ${dif_in} bytes OUT: ${dif_out} bytes “

  dif_out1=$((dif_out * 8 / 1024 / 1024 ))

  echo “IN: ${dif_in1} mbps OUT: ${dif_out1} mbps“

  in_old=${in}

  out_old=${out}

  done

  运行效果:

  # ./stream

  IN: 349179 bytes OUT: 1363936 bytes

  IN: 2 mbps OUT: 10 mbps

  IN: 349612 bytes OUT: 1361852 bytes

  IN: 2 mbps OUT: 10 mbps

  IN: 348684 bytes OUT: 1358952 bytes

  IN: 2 mbps OUT: 10 mbps

  IN: 349998 bytes OUT: 1359092 bytes

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