charter troubleshooting

Although the Linux system is very powerful, stable, but we use the process, if the human operation is not appropriate, will still affect the system, and may even make the system does not boot, unable to run services and other problems. Then this blog post summarizes some common troubleshooting methods, but it is impossible to cover all, can only continue to supplement, update.first, the administrator forgot the password(1), restart the computer, enter

Network troubleshooting and viewing in linux, and network troubleshooting in linux Basic troubleshooting errors Troubleshooting must be simple and complex. Some people repeatedly configure the above files, but they cannot access the network. They always think that the system is faulty and want to reinstall the host. Th

MySQL redo deadlock troubleshooting and troubleshooting process analysis, mysqlredo Problem background I went to work on Monday. I first asked my colleagues about the test results last week. I was told that MySQL Server hang is in multiple instance scenarios and cannot be tested. The native version does not have this problem, this problem occurs in the new version, so I cannot help but feel at ease. I feel

Atitit. troubleshooting series ----- troubleshooting when apache cannot be started, atitit ----- apache Atitit. troubleshooting series ----- troubleshooting when apache cannot be started You can directly use cli to start httpd and print out detailed information .. C: \ Users \ ASIMO> "C: \ wamp \ apache2 \ bin

For a one-time troubleshooting page 502, page 502 troubleshooting First, Scene: System Deepin 15;php 5.5.33;nginx 1.9.9 Second, the situation: simple page output normal (such as phpinfo ();), run any of the company's projects, are 502 Third, the investigation 1, query various logs, including Nginx.error.log, Php_error.log, Php-fpm.error.log, find PHP-FPM error as follows [22-mar-2016 11:06:32] WARNING: [Po

Analysis of troubleshooting and troubleshooting Definition:N ordered elements should have n! . If an arrangement does not place all elements in the original position, it is called an incorrect arrangement. Let's give an n, and find the number of "D" for "1, 2, 3", "...", and give all the error troubleshooting solutions. Reasoning: Step 1: place the nth element i

High-load Mysql troubleshooting and mysql troubleshooting Troubleshooting of Mysql high load Problems Found The top command checks the server load and finds that mysql has 200% of the cpu, which causes the high load of Mysql. It is estimated that it is caused by index problems and some abnormal SQL statements.Troubleshooting 1. determine the type of high load. T

Troubleshooting of common mysql errors and troubleshooting of mysql errors 1. mysql service cannot be started and error 1067 is reported Solution:1). decompress the mysql Server Directory and add a new my. ini file. The content is as follows: [Mysqld] # set basedir to installation path, e.g ., c:/mysql # set it to the installation directory basedir = c:/tool/mysql5617win32 # set datadir to location of data

Linux troubleshooting case (1): linux troubleshooting Running Environment: CentOS6.7 Fault Cause: Yesterday, the command yum-y update was executed online. The command was forcibly interrupted and the poweroff command was run to shut down. If a fault occurs during reboot: According to the prompt information analysis, the system kernel information may be disordered due to the incomplete execution of the

Online troubleshooting commands-Shell, online troubleshooting-shell Creation: Liu Xinyu, latest modification: about 4 hours ago Go to metadata start 1. Track online logs and regularly refresh the latest content tail-fn 200 $log 2. Search for a specified string # Show only matching rowsgrep$String $file# Match up or down n rows of the row where the string is locatedgrep-C n $String $

BTrace: Java online troubleshooting tool, btrace troubleshooting What is BTrace? BTrace is a killer for checking and solving online problems. BTrace can obtain all information during program execution by writing scripts. Note that you do not need to restart the service. Yes, you do not need to restart the service. Write the script and run it directly without the code of the original program. Principle In ge

The local computer cannot start Apache troubleshooting and apache troubleshooting Recently, due to work needs, I have to learn the basic programming of PHP, so I learned how to set up the working environment of PHP. However, as described in the textbook, after WMAP is installed, it cannot run successfully. Then we found that Apache has never been running. Go to the Apache option in WMAP to select start but

Jvm memory growth troubleshooting examples and jvm troubleshooting examplesTroubleshoot jvm memory Growth Troubleshoot the problem that the jvm memory usage continues to increase. record it and take it as a warning. The O M team found that the jvm memory usage of the application fell back after the release and continued to increase. After dumping, it analyzed: Public The bean Generation Code must be mult

I. Purpose Create a communication platform for software testing technology; Build up software testing elites and build the best organization in the software testing industry; Promote and guide the development of software testing

In actual work, we always encounter problems in the production environment. If any problem occurs. And the business is very important. Business needs to restore the system to normal in the shortest time, which puts a lot of pressure on people. Under this pressure, it may make me confused. So how can we quickly and effectively troubleshoot faults? The problem is endless. I personally think that only the thought of troubleshooting and thinking can help

To reduce design complexity and enhance versatility and compatibility, computer networks are designed as hierarchies. This hierarchical system enables a variety of different hardware systems and software systems to easily connect to the network. When analyzing and troubleshooting network faults, administrators should make full use of the layered features of the network to quickly and accurately locate and eliminate faults. However, in the actual

I. Network Complexity General networks include routing, dialing, switching, video, WAN (ISDN, frame relay, ATM ,...) , LAN, VLAN ,... Ii. Fault Handling Model 1. Define the Problem) Detailed and accurate description of fault symptoms and potential causes 2. collect detailed information (Gather Facts) R> Source: key users, network management systems, routers/Switches 1) identify symptoms: 2) Repeat the fault: The verification fault still exists 3) fault frequency investigation: 4) determine the f

In an object-oriented program, the largest switch/case statement I've ever seen has more than 20 conditions. During the run, the code module executes all the conditions each time. Each condition is responsible for creating a new object that is used to communicate with the external use of the application API. After performing some general troubleshooting on one of them, I began to look at the interfaces implemented by the application. To my surprise, e

Believe that many users have encountered the power switch, the fan works but the computer does not start, for the system after the boot of a small number of problems, most users can also be resolved, but encountered even on the boot can not start the problem, most users do not know where to start to solve. In fact, the computer can not start the failure of the normal troubleshooting is not difficult, today small series on the fan work but the host can

Compared with a PC, the probability of a server failure is much lower, but the loss caused by the failure is also large. As a server maintenance personnel, they need to know some basic knowledge about server troubleshooting, know what they can do during maintenance to solve problems most quickly, and reduce the downtime of faults. This document is not a complete manual for server troubleshooting. However, i