linux network monitoring commands

Before using the network, a basic network configuration is required for the Linux host, which allows the host to communicate with other hosts normally.First, network configuration1.IFCFG-ETHN Network configuration fileAll network

The atop command is a monitoring command for a terminal environment. It shows the synthesis of various system resources (CPU, memory, network, I/O, kernel), and is color-coded in the case of high loads.Install Rpmforge FirstFor Rhel/centos 6 32-64 Bit# # Rhel/centos 6-Bit OS # # wget http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.2-2.el6.rf.i686.rpm# RPM-UVH rpmforge-release-0.5.2-2.el6.rf.i686

Well, I 've been practicing in NetEase games recently, so it seems that I haven't written anything for a while... The main purpose of Netease game internship is to know what it is about to work in a game company. After all, I have never been in touch with a game company before .. Still curious... In the past, I may think that gaming companies have all kinds of advantages and they have all kinds of interesting work .. It seems that this is not the case now. After all, the logic code of the game s

Nload: the easy-to-use linux network bandwidth usage monitoring tool nload can display network bandwidth usage, reflecting inbound and outbound network traffic, and is easy to use. Install www.2cto.com: common parameters of yuminstallnload:-t, in milliseconds. The default va

Deny from all Allow from 172.16.16.25 Directory> After you have made changes to the above configuration, don't forget to restart Apache. # Service Apache2 Reload Four, Monitorix screen:Here are some screens, see.Monitorix Web InterfaceSystem load average value, active process, and memory allocation.Global kernel UsageKernel usage per processordisk drive temperature and health statusFile system usage and input/output activityEth0 Interface TrafficSystem service Re

, the string is constantly refreshed, which is the flow of data transfer process and data packets, focusing on the third and fourth columns that represents which ip+ port is connected to which ip+ Port . Ctrl + C exits the program.The tcpdump also has the- C and- w options,-c Specifies the number of catches, and-W saves the crawl results to the specified path [Email protected] ~]# tcpdump-nn-i ens33-c 10-w/home/ask/documentation/ Besides, there are [[email protected] ~]# t

The Vmstat command is the most common Linux/unix monitoring tool that can show the status of a server at a given time interval, including server CPU utilization, memory usage, virtual memory exchange, IO Read and write situations. This command is I see Linux/unix favorite commands, one is

"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_

System optimization is a complex, complex, and long-term task. The following subsystems are usually monitored: CPU, Memory, IO, Network, etc. I. CPU performance indicators CPU utilization: User Time Context switch: It is associated with the CPU usage. If the CPU usage is in good state, a large number of context switches are acceptable. Runnable queue: three threads per processor.Monitoring tools Vmstat $ Vmstat 1 First, let's look at a field that can

manage which users can access the Ntopng through the settings menu on the right-hand side of the top (the one on the gear icon).Ntopng offers a wide range of timelines, from 5 minutes to 1 years. You just need to click on the timeline you want to display. The chart itself can be clicked, and you can click it to zoom in.Of course, Ntopng can do more than the above picture shows. You can also integrate location and e-map services. On Ntopng's own website, there are paid modules available for use,

: http://jmeter-plugins.org/downloads/all/PerfMon:Used to monitor server CPU, I/O, memory, etc.Serveragent-2.2.1.zipUsage: Perfmon is decompressed and placed on the server under test and shipped./startagent.sh, which works on port 4444 by default1. Check if Linux port is started: Netstat-apnt|grep 44442. Check the JMeter machine to the Linux firewall: Telnet IP 4444Jmeterplugins:Jmeterplugins-extras-1.1.2.z

2. Detailed Network connection StatusA total of 12 possible states, the first 11 are based on the TCP connection established three handshake and the TCP connection broken four wave process to describe.1), LISTEN: First, the server needs to open a socket for monitoring, the status of listen./* the socket is listening for incoming connections. Listening for connection requests from remote TCP ports */2), Syn_

package resources, need to add. Enter the wireless card interface Wlan0mon in the intf, and other configurations can be ignored. After exiting the service, the log file is saved by default in the/root/directory, there are 5, can be viewed. The file format is as follows:>alert: This file includes all the warning messages.>gpsxml: If a GPS source is used, its associated GPS data is stored here.>nettxt: Includes all the collected file output information.>netxml: Includes all the XML format data.>p

Tool 1 SAR The SAR command is included in the sysstat toolkit and provides numerous statistics about the system. Its commands vary in different systems. Here we only talk about its network data monitoring parameters. Sar-N [Dev | EDEV | sock] interval CNT The SAR provided by some systems supports statistics based on network