linux檢視端口流量的腳本

# cat stream

#! /bin/bash

# Write by Neil.xu  qq:959794112email: [email protected]

# 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

#ps auxw 和 #netstat -ln   檢視程序是否被占用