best monitor for mame

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Use the tcpdump command in Linux to monitor network connections

The Linux test tool tcpdump command is used to monitor TCP/IP connections and directly read data headers at the data link layer. You can specify which data packets are monitored and which control formats are to be displayed. For example, we want to monitor the communication between all Ethernet and execute the following command: tcpdump-ieth0, let's take a look at the specific content. Even in a relatively

Familiar with ROM Monitor vro maintenance (1)

For many beginners, the ROM Monitor of Cisco routers is often unfamiliar or even daunting. The reason is very simple. First, we do not often use this mode and are not familiar with its related operations; second, Operation errors in ROM Monitor mode often cause fatal damage To routers, such as destroying IOS files in flash, resulting in system crashes. So many people put their hands on it and are discourage

"Vmcloud Cloud Platform" Scom advanced-Global Monitor

Do not know whether people have such a demand, a URL I do not want to do not only from the internal monitoring (intranet environment), I also want to monitor from outside. Such requirements usually in the intranet to establish an external network IP machine as a monitoring point and then restrict the machine intranet access to achieve. OK, today's another weapon in Scom's end-to-end monitoring, the global Service

Monitor, Thold, setting installation of cacti under CentOS

One, download the required installation packageThere are two methods of downloading:1. Download to local, install by Mount:Main download page: http://docs.cacti.net/Php-weathermap-0.97a.zipSettings-v0.71-1.tgzThold-0.4.1.tar.gzMonitor-v1.3-1.tgz2, directly in the CentOS through the wget command to download the installation:wget http://docs.cacti.net/plugin:settings/settings-v0.71-1.tar.gzwget Http://www.network-weathermap.com/files/php-weathermap-0.97a.zipwget http://docs.cacti.net/plugin:monito

Using pt-heartbeat to monitor the replication latency of MySQL, pt-heartbeatmysql

Using pt-heartbeat to monitor the replication latency of MySQL, pt-heartbeatmysql Pt-heartbeat During database master-slave replication, whether the replication status and data delay are normal is a critical indicator. How can we monitor it? Pt-heartbeat is a centralized tool developed by PERCONA to monitor replication latency of MySQL and PostgreSQL. Mature, suc

Ext: VISUALVM Monitor the Java program on the remote machine

Transferred from: http://hanwangkun.iteye.com/blog/1195526The JDK itself has a lot of monitoring tools, such as Jconsole. The tool we are going to talk about today is VISUALVM, which is one of them. But this tool is only in JDK1.6.07 and above. It is a good free monitoring tool to monitor the JVM heap, thread, class loading situation and JVM GC condition of Java programs.Monitoring range: JDK1.4 and above versions of the program can be monitored.It is

Python scripts monitor docker containers and pythondocker containers

Python scripts monitor docker containers and pythondocker containers This article provides an example of how to monitor docker containers using python scripts for your reference. The details are as follows: Script Function: 1. Monitor CPU usage 2. Monitor memory usage 3. Monitor

Nagios uses nsclient++ to monitor Windows hosts

There is check_nt this plugin under Nagios's libexec, which is used to check the services of Windows machines. Its function is similar to Check_nrpe. But it also needs to be paired with another software nsclient++, which is similar to Nrpe. We need to download the appropriate version of Nsclient and install it on the monitored Windows host.Overview of NRPEThe principle of nsclient++ is as follows:You can see that the biggest difference between nsclient and Nrpe is: NRPE: The

Nagios Monitor Printer

Nagios thinks its good stateful detection mechanism enables Nagios to monitor different plug-ins on different platforms, and it also supports the use of SNMP protocol (Simple Network Management Protocol) to monitor various platforms and devices. So Nagios can also use the SNMP protocol to monitor the printers in the LAN, and the Nagios

Use Opserver to monitor your ASP (I. Introduction to OPSERVER monitoring and platform Setup)

Original: Use Opserver to monitor your ASP (one, Opserver monitoring introduction and platform building)ObjectiveThere have been 2 articles on how to monitor the ASP. NET Core project.Today we mainly talk about how to monitor our ASP.First, let's introduce what is Opserver, which is the stack Overflow (Stack Overflow is a program-related IT technology quiz site.

Linux systems monitor changes to files and folders under a directory

Inotifywait is a tool that can monitor file changes in real-time, using the inotify mechanism in the Linux kernel to implement monitoring capabilities. View Kernel version [Email protected]oracle ~]# uname-r 2.6.32-220.el6.i686 Installing Inotify-tools Yum Install-y Inotify-tools Test monitoring/etc,inotifywait-m/etcUse putty to connect to the server, open another terminal, with vim to edit the/etc/passwd, the

How does thread synchronization work inside the monitor? What level of synchronization should the program do?

In a Java virtual machine, each object (object and Class) is associated with a logical association monitor, each monitor and an object reference, in order to implement the exclusive functionality of the monitor, each object is linked with a lock.Once a method or block of code is synchronized modified, this part is placed in the monitor's monitoring area, ensuring

Shell scripts to monitor Linux system load vs. CPU, memory, hard disk, number of users

The main contents of this section:Use shell scripts to monitor the load, CPU, memory, hard disk, and user logins of Linux systems.One, Linux system alarm mail script# vim/scripts/sys-warning.sh#!/bin/bash#site:www.jquerycn.cn# Monitoring System load and CPU, memory, hard disk, log on the number of users, beyond the alert to send an email alarm. #提取本服务器的IP地址信息IP= ' Ifconfig eth0 | Grep"inet Addr"| Cut-f2-D":"| Cut-f1-D" "` # 1,

What is the test method of the monitor black screen crash failure?

Most of the system crashes appear as black screen (that is, there is no display on the monitor screen), this kind of fault and display, display card is closely related, at the same time the system motherboard, CPU, CACHE, memory, power and other parts of the fault can also lead to black screen. The general inspection method of the system black screen crash is as follows: 1. Eliminate fake black screen: Check whether the power plug of the

What about a ripple jitter on a computer monitor?

Electromagnetic interference. The most common may be that the laptop is connected to the power will shake, and do not connect the power is fine. This is generally more prone to industrial electricity, you only need to replace a power adapter or the power plug to cut off the ground can: Electricity effect. In this case, you are connected to a computer socket that is powered by heating, cooking or using a large power device such as a washing machine. This is very simple, do not take t

computer monitor color display abnormal problem summary

Exclusion method 1 Check the display card and monitor the connection line is normal2 Check if there is any damage to the video card3 have individual software runtime itself color is not normal, generally appear in the old machine inside, in the BIOS option has a color correction function, correct the line4 There is a more common reason, the display magnetization, this kind of situation occurs in the monitor

A detailed tutorial on using tripwire to monitor data integrity under Linux installation and construction tripwire system

ObjectiveWhen the server is attacked by hackers, in most cases, hackers may modify some important files, such as system files, and so on. In this respect, we use tripwire to establish data integrity monitoring system. Although it can not protect against hacker attacks and hackers on some important files, but the change is able to monitor whether the file has been modified and which files have been modified, so that the attack after the targeted plan t

How to set the best resolution for Samsung computer monitor

Samsung display because of different sizes and models, the best resolution is also different. Monitor resolution is not adjustable, if you need to adjust the resolution, adjust the resolution of the external device, such as: Adjust the resolution on the computer host, set the resolution to the best resolution of the monitor. Here you are prompted: If the computer host does not find the best re

How to monitor FTP space usage

We often use FTP to share files, often occurs when there is insufficient FTP space, this time can not share resources. How to monitor the amount of FTP space remaining? If there is a lack of space risk, give warning immediately. Just the Windows system with the "performance monitoring" function can be done, eliminating the use of third-party monitoring tools trouble. First step, enable the performance feature In the FTP server, click "Start → run", en

Handy turn off Mac Monitor Exposé 's good features

If you use a Mac for a short time without the ability to turn off the monitor, just move the cursor, just go ahead and set it in System Preferences, as follows: Open System Preferences, click Exposé and spaces; Then set the exposé Active screen corner and its corresponding function in the exposé and Spaces settings interface. In the following example, I define the lower right corner of the screen as "put the Monit

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