linux trace network traffic

#input the network name if [-N "]; Then Eth_name=$1else eth_name= "eth0" fi send_o= ' ifconfig $eth _name | grep bytes | awk ' {print $6} ' | Awk-f: ' {print $} ' recv_o= ' ifconfig $eth _name | grep bytes | awk ' {print $} ' | Awk-f: ' {print $} ' send_n= $send _orecv_n= $recv _o i=0while [$i-le 100000]; Do send_l= $send _n recv_l= $recv _n sleep 2 send_n= ' ifconfig $eth _name | grep bytes | awk ' {print $6} ' | Awk-f: ' {print $} ' recv_n= ' ifconf

"Unix/linux Network log analysis and Traffic monitoring" new book listing one months, sales ranked TOP 10, thank you for your support, there will be a heavy new book launch, 2015 Happy New Year!650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/57/C0/wKioL1SkpVfChn_nAAaBy3tWQs4478.jpg "title=" screen shot 2015-01-01 a.m. 8.44.22.png "alt=" Wkiol1skpvfchn_

I. Introduction of NethogsShare a check on the bandwidth usage of the detection system process under Linux. Open source tools from GitHub.It does not rely on modules in the kernel. When our server network is abnormal, you can run the Nethogs program to detect that the program is taking up a lot of bandwidth. Find time saved.Second, installation method1. You can install the Yum directly in the Epel sourceYum

First, introduce Linux under the nload is a very useful tool, the function is very strong, but relatively single, can only view the total flow. Can monitor the traffic of the network card in real time, divide incoming,outgoing two parts, namely flow of inflow and outflow At the same time statistics current, average, smallest, largest, total flow value official

;NBSP;NBSP;0}I'm also a split line ************************************Error message7. Nagios Server Errorunknown-read or Write file/var/tmp/check_traffic_192.168.1.247_2__itnms.hist_dat_64 Error with User uid=501 (Nagios) G id=503 (Nagcmd) groups=502 (Nagios), 503 (nagcmd). Workaround:chmod nagios.nagcmd /var/tmp/check_traffic_192.168.1.247_2__itnms.hist_dat_64 This article is from the "Linux related sharing" blog, make sure to keep this source ht

-secondExitFiWhile TrueDor1= ' Cat/sys/class/net/$1/statistics/rx_packets 't1= ' Cat/sys/class/net/$1/statistics/tx_packets 'Sleep $INTERVALR2= ' Cat/sys/class/net/$1/statistics/rx_packets 'T2= ' Cat/sys/class/net/$1/statistics/tx_packets 'txpps= ' Expr $T 2-$T 1 'rxpps= ' Expr $R 2-$R 1 'echo "TX $: $TXPPS pkts/s RX $: $RXPPS pkts/s"Donenetspeed.sh---network bandwidth measurement#!/bin/bashInterval= "1" # Update INTERVAL in secondsIf [-Z ']; ThenEcho

$} ') Sleep 1rxnext=$ (Cat/proc/net/dev | grep $eth | tr: "" | awk ' {print $} ') txnext=$ (Cat/proc/net/dev | grep $eth | tr: "" | awk ' {print $} ') Clearecho -e "\ t RX ' date +%k:%m:%s ' TX" rx=$ ((${rxnext}-${rxpre})) tx=$ ((${txnext}-${txpre} ) if [[$RX-lt 1024x768]];thenrx= "${rx}b/s" elif [[$RX-gt 1048576]];thenrx=$ (echo $RX | awk ' {print $1/1048576 "MB/S"} ') E lserx=$ (echo $RX | awk ' {print $1/1024 "kb/s"} ') fi if [[$TX-lt 1024x768]];thentx= "${tx}b/s" elif [[$TX-gt 1048576]];th

View shell scripts for Linux server network trafficWhen uploading a large number of files, you can use this script to implement monitoring!#!/bin/sh## #统计5s内的平均流量, if[ "$" = "];thenecho-" in megabytes e "\nuseinterface_nameafterthescript,like \ "$0eth0\" ... \ n "exit-1fiecho-e" \n startmonitoringthe$1,press\ "ctrl+c\" tostop "echo--- -------------------------------------------------------#ls /etc/sysconfig

Previously wrote a view of the Linux server current traffic small script, very simple, but can intuitively give us some information#!/bin/sh## #统计10s内的平均流量, if[ "$" = "];thenecho-e" in megabytes "\nuseinterface_nameafterthescript,like \ "$0eth0\" ... \ n "exit-1fiecho-e" \n startmonitoringthe$1,press\ "ctrl+c\" tostop "echo--------- -------------------------------------------------#ls /etc/sysconfig/

"Unix/linux Network log analysis and Traffic monitoring" experimental environment download650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/53/C2/wKiom1Ru9IygmzgRAAQuIqyf7TA962.jpg "title=" Unix-linux123.jpg "alt=" Wkiom1ru9iygmzgraaquiqyf7ta962.jpg "/>1.Ossim 4.1 Virtual machine Download (for servers running on 2~4g memory)2.Ossim 3.1 Virtual machine do

In linux, tcpdump is used to monitor network traffic, and exported files are obtained to wireshark in windows to analyze the command lines in linux: tcpdump-I eth1-s 0 host 10.12.129.3-w output.txt-I indicates listening on eth1. The default value is eth0,This is not specified at the beginning, and the

Linux host network traffic monitoring ifstatIfstat is used in this monitoring program. Installation Method reference:Http://man.linuxde.net/ifstat1. DownloadHttp://gael.roualland.free.fr/ifstat/ (Official Website) wget http://gael.roualland.free.fr/ifstat/ifstat-1.1.tar.gzFrom: http://man.linuxde.net/ifstatYou can also download the file in a browser and use secur

Get Linux network traffic script Syntax: [-- help] [-I] [-D] #! /Bin/bash Version = "1.0.0.1"Eth = ""SEC = 0 Help (){Printf "version: $ version \ n \Usage: $0 [-I interface] [-D time] \ n \\ T-I | -- interface: The needs of the inquiries interface network card (such as eth0, eth1...) \ n \\ T-d | -- Time: De

Nload is a simple and easy-to-use bandwidth flow monitoring tool under Linux, and dynamic graphics based on character interface display the current traffic of the NIC. However, CentOS official source does not have it, can not directly use Yum installation. We can download the third party RPM release platform and recommend the following source, which releases multiple RPM packages http://pkgs.repoforge.org

Use iftop to monitor network traffic and iftop to monitor network traffic Iftop is a useful tool. The following command monitors the wireless network card of my notebook iftop -i wlan0 For example, if I play a video of letv, The iftop displays the following information:

#!/bin/bash #显示菜单 (radio) Display_menu () {localsoft=$1localprompt= "which${soft} You ' dselect: ' evallocalarr= (\${${soft}_arr[@]}) whiletruedo echo-e "####################${soft}setting####################\n\n" for ((i=1;iThis article is from the "Smurf Linux ops" blog, so be sure to keep this source http://jin771998569.blog.51cto.com/2147853/1587726Check the network port

route? Why do we need to differentiate POSTROUTING into INPUT and FORWARD? In addition, FORWARD is also a kind of routing... what's really reasonable is that the INPUT and FORWARD should be the subHOOK points mounted on POSTROUTING. they can be implemented into a HOOK Operation, which can be directly removed from the OUTPUT! The HOOK points are neither specific nor specific. this logic should be differentiated by HOOK Operation.After the Linux IMQ pa

Use Ntop to monitor network traffic ____ Network traffic reflects the running status of the network, which is the key data for determining whether the network is running normally. In the actual

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

,initrd ( hd0,0)/myinitrd4m.img The kernel boot process includes start_kernel before and after, all of which are pre-initialized assembly instructions, then start the C code of the operating system initialization, and finally perform the first user-state process init. Generally in two-phase boot, first take advantage of the INITRD memory file system, and then switch to the hard disk file system to continue to boot. There are two main functions of the initrd file: 1, providing boot required but t