linux traffic shaping

This article may be helpful if you think that a gigabit Nic on an intranet server cannot meet your switching needs.In fact, I have never thought about writing this article before, because I had an interview with a well-known domestic video website two days ago. I had the following question: "I will give you a server with four Gigabit NICs, how can I achieve the maximum 4G traffic output?" At that time, I did not think much about completing the job. Af

There are two small men in my heart. One called guilt, to csdn so a knowledge-sharing platform of guilt, because I am doing a sorry csdn thing. One called vanity, the desire for csdn visits made me step out of this. This step, stepped into the abyss. In the end, my guilty villain died. Suicide. The vanity man ascended the historical stage. So this blog post is issued.The following script is used to automatically increase the amount of CSDN access to the shell script first of all, this script is

Sometimes we need to look at the network card traffic on the server in real time, here I write a shell script. The script uses a while true "dead loop", every 10s from "/proc/net/dev" to take a value and calculates the average bandwidth within 10s based on the difference within 10s; Press CTRL + C to stop execution. Scripts are compatible with CENTOS6 and 7, the scripts are not too complex, and the annotations in the script are more nuanced, so I don'

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 Install Libpcap nethogs-y2. Source Mode inst

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 website: http://www.roland-riegel.de/nload/in

Linux Real-time traffic monitoring (iptraf Chinese illustration) After the installation of Red Hat 4, the default will be installed IPTRAF Network Tools, if you do not fully install, you can find Iptraf RPM package installed in the CD, installation completed in the terminal under the Input Iptraf Open tool, successfully opened, you will see the monitoring software on the information page: Press ENTER to en

Article Title: Linux server site traffic limit solution. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. #! /Bin/sh # Simple bandwidth limiter- # Change this to your link bandwidth

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/networ

Want to see the Linux traffic situation in real time, and do not want to go to the third-party tools, you can directly write footsteps run!System: CentOS 6.5Principle: Obtain the flow from the/proc/net/dev, and then by the conversion and divided by the interval time to get the flow unit m#------------------#Author: administrator#created: --Geneva-Ten#------------------#!/bin/bash# Usage Method usage () {Ech

"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 download (for older servers running 1~2g memory

Iftop script installation, download script to the/usr/local/sbin/directory: Iftop script reference adsorption pieces! Rename to: iftop.sh Note: Permissions must be granted to run: #chmod 755 iftop.sh or #chmod u+x,g+x,o+x iftop.sh #./iftop.sh or SH iftop.sh ------------------------------------------------------------------------------------- You can use top to view system resources, processes, memory footprint, and so on in Linux systems. View n

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/network-scripts/|grep ifcfg|cut-d "-" -f2whi

;3) The installation is complete, the flow monitoring can be carried out by #iftop command (with relevant parameters).650) this.width=650; "Src=" Http://s3.51cto.com/wyfs02/M01/82/EF/wKiom1dmEDKhxcFYAAMJZXikjxk093.jpg-wh_500x0-wm_3 -wmp_4-s_1706494690.jpg "title=" 3.jpg "alt=" Wkiom1dmedkhxcfyaamjzxikjxk093.jpg-wh_50 "/> Compile and install:Prerequisites: In the presence of a compiled installation environment (development tools: GCC;p erl;python;glibc;gtk;make; automake , etc. ). 1) mostly

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: $0 [-I interface] [-D time] \ n \\ T-I | -- interface: The needs of the inquiries interface network card (such as eth0, eth1...) \ n \\ T-d | -- Time: Delay Time (seconds) \ n ";} Echo "$ *"For dummyDoCase $1 in-- Help) help; Exit 1 ;;-I | -

1 command line Input directly: Iptraf (if not, install with yum install Iptraf)2. Open Enter to select IP image.3. Select the interface for the monitoring test, all interfaces.4. Turn on the listening status log and the system default log path. /var/log/iptraf/ip_traffic.log4. After running, turn on the monitor network card traffic5.iptraf Reference Usage:Man Iptraf ViewThere are also many tool commands to view:Watch command:Watch-n 1 "/sbin/ifconfig eth0 | grep bytes ".Other answers1, Iptraf to

", Strerror (errno)); } rx_buf[data_size-1] =' + ';if(data_size = Read (Flowtx_fd,tx_buf,sizeof(TX_BUF))) == -1){fprintf(stderr,"Read_tx:%s\n", Strerror (errno)); } tx_buf[data_size-1] =' + ';//josn Format {"FirstName": "Brett", "LastName": "McLaughlin", "email": "AAAA"} fprintf(Flowst_pin,"{\" up_flow\ ": \"%s\ ", \" down_flow\ ": \"%s\ "}\n", Rx_buf, TX_BUF); Fflush (Flowst_pin); Lseek (FLOWRX_FD,0, Seek_set); Lseek (FLOWTX_FD,0, Seek_set); Sleep2);//Change the file size

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

0.000 kb/sec? Root. 92:80-192.168.25.57:47865 0.000 0.000 kb/sec? Root. 92:80-192.168.25.99:60505 0.000 0.000 kb/sec? Root. 99:52048-192.168.20.94:80 0.000 0.000 kb/sec? Root. 57:54916-192.168.20.94:80 0.000 0.000 kb/sec? Root. 2335-192.168.25.118:10050 0.000 0.000 kb/sec? Root. 2334-192.168.25.118:10050 0.000 0.000 kb/sec? Root. 2333-192.168.25.118:10050 0.000 0.000 kb/sec? Root. 2332-192.168.25.118:10050 0.000 0.000 kb/secThis article is from the "Boyhack" blog, make sure to keep this source

-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 ']; ThenEchoecho Usage: $ [network-interface]Echoecho e.g

One, the IP attribution database to export the required address segment listSecond, installation IpsetThird, establish access whitelistIpset Create Access Hash:netIv. Importing IP addressesUse Strict;open INPUT, "Output.txt" and while (V. Setting iptables rulesIptables-a input-m set--match-set access src-p UDP--destination-port 53-j acceptiptables-a input-p UDP--destinati On-port 53-j DROPThis article is from "Ruyi Spirit Pro" blog, please be sure to keep this source http://417722381.blog.51cto.