how to troubleshoot mac

Troubleshoot malicious packet sending and packet sending on the server On the 30th, I found that the traffic of one server in another service line of my data center was extremely high (the outbound traffic of a single server exceeds 900 MB), and the access to the server was particularly slow due to the impact of traffic on service access. We suspect that this linux server should be infected with Trojans, so we need to take emergency measures to first

backend Web server and returns HTTP code 200, pay careful attention to the timestamp and discover that the back-end server's Http Response Code 200 responds more time than the application network The Http Response Code 502 that logged this URL access is 1 seconds or longer. The above analysis process can be determined that this problem is related to the slow response of the backend Web server.This includes two possibilities: The WEB server is working abnormally.If you are an IIS-b

SQL Server to troubleshoot high CPU usageThis noon, a friend asked me to help him look at the database, the operating system is WINDOWS2008R2, the database is SQL2008R2 64-bit64G memory, 16-core CPUHardware configuration is still relatively high, he said the server is running Kingdee K3 software, database instances have multiple databasesHe said it was only a few days ago, and at a certain time of the day, there will be high CPU usageMemory consumptio

ARPWATCH listens for ARP communication in the broadcast domain and records the relationship between the IP address of each device and the MAC address. When the IP address changes, it sends an email notification. A common sign of ARP attacks is that the gateway's MAC address changes. Of course, ARPWATCH is not omnipotent. Generally, the server where you install arpwatch cannot always receive arp events from

Install ant on Mac and ant on Mac After reading how others install ant on mac, they generally download the binfile from the official website, modify the permission, create a link, and configure the path. Is it so troublesome? I don't think so. Run the following command: Forlong401: build forlong401 $ sudo brew install ant Password: ==>Downloading https://downloa

How to troubleshoot GridInfrastructure startup issues [ID 1050908.1] Modified25-jun-2010TypeHowtoStatusPublished In this documentGoalSolutionStart upSequence:Cluster statusCase 1: ohasd. Bin does not startCase2: ohasd agents does not startCase 3: cssd. BinDoes not startCase 4: crsd. Bin does notStartCase 5: gpnpd. Bin does notStartCase 6: varous other daemons does notStartCase 7: crsd agents does notStartNetw

Assuming that the server environment only knows that running php code in php-fpm mode with Ngnix is also relatively simple die ( quot ;.................... quot;); modify the code to discover cache problems! Step 1, step 2, step 3... Step N assumes that the server environment only knows how to run with Ngnix in php-fpm Mode Php code is also relatively simple Die ("...................."); Cache error detected by modifying code! How to troubleshoot

Troubleshoot problems on the server for the first five minutes2014/08/07 · It technology · 3 Reviews · Server, System administratorshare to: 94 Baidu map in the use of Android Android image processing-build beauty 美图秀秀 start with it Android Property Animation appreciation android-Multi-platform sharing (Sina Weibo) This article by Bole online-old yards agricultural translation, Huang Li-min school draft. without permission,

Troubleshoot excessive number of TCP connectionsTCP state Migration, Close_wait Fin_wait2 IssuesTCP State MigrationEveryone to netstat-a command very familiar, but, you have not noticed the state of a column, basically shows the established,time_wait,close_wait, and so on, these exactly what meaning, in this article, I will elaborate.It is very clear that the TCP initialization connection three times handshake: send the SYN packet, then return the Sy

The previous article describes memory leaks and how to avoid them, and this article describes how to troubleshoot when memory leaks occur1. Manual debugging with a stupid method 1 Check the code for each new, malloc has a corresponding delete, free 2 observe which code can allocate memory and free memory, add breakpoints up and down, run in debug mode 3 Open Task Manager to view the memory footprint of the debugger, 4 Exclude indi

Assuming the server environment just knows to run with Ngnix using PHP-FPM mode PHP code is also relatively simple Die ("............"); Modify code Discovery Cache issues! How to troubleshoot problems with changes Step 1, Step 2, Step 3 ... Step N Reply content: Assuming the server environment just knows to run with Ngnix using PHP-FPM modePHP code is also relatively simpleDie ("............");Modify code Discovery Cache issues!How to

How to troubleshoot Ajax cross-domain issues (GO)Since very few previous front-end code (haha, unqualified programmers AH), the recent project using JSON as a means of interaction between systems, natural accompanied with many Ajax requests, followed by the problem is to solve the cross-domain Ajax. This article will describe a small white from encountering cross-domain problems, to know that cross-domain issues do not know how to solve, and then to s

How to troubleshoot Webkitbrowser use error "Failed to initialize Activation context" Source: Internet time: 2014-12-22 4:55:22This article mainly describes "How to solve Webkitbrowser use error" Failed to initialize activation context ", mainly related to aspects of the content, for. NET Tutorial Interested students can refer to:The project that was just Zhou needs to be embedded in the browser.Originally used in the VS in the WebBrowser, called the

Demopu teaches you to troubleshoot CentOS system failures-Remove the "beep" alarm sound from Virtual machine LinuxReprint: http://www.demopu.com/?p=472VMware Redhat, under the shell because of the wrong command or a variety of reasons, will issue a "beep" alarm sound, not sound card issued, but the motherboard alarm, so can not be closed by the speaker to solve. The office often sounded such a harsh voice, today on the internet found a solution, note:

Troubleshoot 1: Why can't abstract keywords coexist with private, static, final① Private means that the subclass is not able to inherit the private method of the parent class when it modifies the method, but the method of the abstract modification must inherit and implement the quilt class, all of which conflict. static meaning, the so-called static is shared, and when it modifies the method is static method, static method is not created object can be

SQL Server---Troubleshoot SQL Server data subtotals with caseNearly half a year has been responsible for the development and maintenance of a city's personnel file management system, before the customer gave a table, need me to summarize the data, and then fill in the table.Specific needs: Statistics of how many different letters (or reports) each worker has printed in a certain period of time.The original idea1. Identify the staff using the systemSel

How do I troubleshoot hardware problems in a Linux system? (2) 2013-03-27 10:32 51cto.com of nuclear coke translationfont Size:T | T In the Linux system, the troubleshooting of hardware problems may be the most difficult task in the field of Computer Management, even if the experienced users sometimes encounter their own situation, this article share some practical skills and processing methods, hope to help readers understand, identify and finally s

Often some friends come to ask me, Wei Wei Ah, my site was down right, you help me to see what is the reason is down right, my problem is where! The website looks much! I also summed up, most of us down right, are the following several situations! Today, Wei-wei Seo to tell you specific to check our site is down right for which reason!One is personal experience, like if we are engaged in some medical industry, this change of Baidu algorithm every time, the first is this kind of website! The seco

Have you ever experienced an Internet or Wi-Fi connection problem? No matter what the problem-from the weird Wi-Fi problem (there is a signal, but not even), even if not connected to the Internet, at this time you need to troubleshoot the router, which can help you solve some headache problems. This also applies to your modem, where many Internet service providers combine modem and router functionality. So your wireless router and modem may actually

For computer users, the closest thing is the display, it can be said that it is an integral part of the computer system. At present, we commonly used CRT monitors, and CRT monitors are also very prone to failure, so how can you check and troubleshoot these failures? The following for you to introduce some of the common troubleshooting, hope to be able to use a good computer to help. 　　Q: How to troubleshoot