Monitor linux traffic for shell and linux traffic for shell

Monitor linux traffic for shell and linux traffic for shell

If you want to view linux traffic in real time and do not want to go to a third-party tool, you can directly write and run it!

System: centos 6.5

Principle: Get the traffic from/proc/net/dev, and then get the traffic unit M by converting and dividing by the interval.

# ------------------ # Author: Administrator # Created: 2015-04-10 #------------------#! /Bin/bash # usage () {echo "useage: $0 ethname intervel" exit 0} # configure the network port if [$ #-gt 1]; then ethname = $1 num = 'ifconfig | grep $ {ethname} | wc-l' if [$ num-gt 0]; then ethname = $1 else echo "Can't find $ ethname, Please Check" exit 1 fifi # Time configuration intervel = 1if [$ #-gt 0]; then interval = $2 test = 'expr "$ interval" \ * 0' if ["$ test "! = "0"]; then echo "Invalid <interval> param' $ interval '. it shoshould be a integer number. usage: $0 ethname intervel "exit-1 fi if [$ interval-lt 1]; then echo" Invalid <interval> param '$ interval '. it shoshould be> 0 (seconds ). usage: $0 ethname intervel "exit-1 fifi # function to determine if [$ #-ne 2] then usagefiecho" $0 is starting, Device is $1, intervel is $2 "echo-e" \ n "typeset Rev old_Reveth = $1 intervel = $ 2old_Rev = 'cat/proc/net/dev | grep $ eth | awk '{print $1} '| awk-F: '{print $2}' 'Old _ Send = 'cat/proc/net/dev | grep $ eth | awk '{print $9}' # echo "old_Rev is $ old_Rev "# echo" Old_send is $ old_Send "while true do sleep $ intervel Rev = 'cat/proc/net/dev | grep $ eth | awk '{print $1}' | awk-F: '{print $2} ''Send = 'cat/proc/net/dev | grep $ eth | awk' {print $9}'' # echo "Rev is $ Rev" # echo "Send is $ Send" diff_1 = 'awk-v Rev = $ Rev-v old_Rev = $ old_Rev-v intervel = $ intervel 'in in {printf "Receive is % 6.2f", (Rev-old_Rev) /1024/1024/intervel * 8} ''diff_2 = 'awk-v Send = $ Send-v old_Send = $ old_Send-v intervel = $ intervel 'begin {printf" Send is % 6.2f ", (Send-old_Send)/1024/1024/intervel * 8} 'echo "'date + '% Y-% m-% d % H: % M: % s' Speed: IN $ {diff_1} mbps OUT $ {diff_2} mbps "old_Rev = $ Rev old_Send = $ Senddone

 

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