heater troubleshooting

How to debugvip fault problems and troubleshooting VIP resources cannot start due to lack of gateway problems: ----- view node application resources statistics: u01crsbinsrvctlconfignodeapps-ndbtest2-a-g-s-lVIPexists.: dbtest2-vip10.11.11.198255.255.255.0eri0GSDex How to debug the vip fault and how to solve the problem that the VIP resource cannot be started due to the lack of Gateway: ----- view the node Application resource statistics: /u01/crs/bin/

How DHCP servers work Key points of this Chapter Working principle of the Dynamic DHCP (Dynamic Host Configuration Protocol) server.  Install the DHCP server.  DHCP server troubleshooting. DHCP is used to automatically provide IP addresses, subnet masks, and route information for computers. Network administrators usually assign IP addresses in a certain range to distribute the IP addresses to clients on the LAN. When devices access the LAN, they req

Troubleshooting of xmanager linux connection errors-Linux Enterprise Application-Linux server application information. For details, refer to the following section. When xmanager is used to connect to linux, the following message is displayed: The X11 forwarding request was rejected! To solve this problem, please turn on the X11 forwarding feather of the remote SSH server The Show reply messages information is as follows: [11:51:51] Connecting to '20

string ss = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";Random a = new random ();int b;String yan = "";for (int i = 0; i {b = A.next (62);Yan + = ss. Substring (b, 1);}Console.WriteLine ("Verification Code is:" + yan);Console.Write ("Please enter the Verification Code:");String c = Console.ReadLine ();if (c.toupper () = = Yan. ToUpper ()){Console.WriteLine ("The Verification code is correct! ");}Else{Console.WriteLine ("Captcha Error! ");}Console.ReadLine ();C #

In the previous article, we introduced the NFS protocol. I am sure you have understood the basic concepts and configurations of this product. Here we will mainly explain how to solve NFS Protocol faults and related security issues. NFS Protocol troubleshooting 1. NFSD is not started. First, check whether the NFS output list exists. Otherwise, nfsd will not start. You can use the exportfs command to check whether the exportfs command returns the result

-------- ObReferenceObjectByName () troubleshooting for driver development --------, ------------------------------------------------------ When writing a filter driver or rootkit, you often need to attach it to the target device in the device stack to intercept the passing IRP (I/O Request Packet) and implement the filtering function.First, you must know that the target device is registered with the global namespace maintained by Windows Object Mana

Postfix skills and troubleshooting commands Here are some commands I use every day. Of course, other email administrators will also use them, so I will write them down in case I forget them. LIST/print the current Message Queue # Postqueue-p # Mailq If the queue is too long, you can use the tail pipeline to read it. # Mailq | tail Clear queue # Postqueue-f Immediately post all emails for a domain.com Domain Name # Postqueue-s domain.com

HP array card troubleshooting example The company uses HP gen8 and p420i array cards. At the other end of the system, the nagios monitoring system works with the nrpe script check_hpasm to regularly check hardware health. Recently, in order to make the machine more energetic, coupled with SSD hard drives, the mechanical hard drive is only used for large-capacity storage, while feeling the speed and passion, the tragedy comes one after another. Nagios

Use SSHFS to mount the directory above the server to Windows for easy and easy access. Mount on the previous system, no problem. Recently bought a solid state drive, installed a system. The result of running the SSHFS times on the system is the following error: In fact, it is very simple, dokanmounter service is not open. To the Control Panel –> management tool –> Service, find the Dokanmounter service, start first, then set to start automatically, do not set up the next time.

(@ "Task1%@", [nsthread currentthread]); };dispatch_block_t Task2 = ^ { NSLog(@ "Task2%@", [nsthread currentthread]); };// sync Dispatch_sync(Mainqueue, Task1); Dispatch_sync(Mainqueue, task2); NSLog(@ "End"); }The task for the Home row asynchronous home column is performed only in the main thread, in turn -(void) Mainqueueasync {//Home row dispatch_queue_t mainqueue = dispatch_get_main_queue(); //2. Task dispatch_block_t Task1 = ^ { [nsthread sleepfortimeinterval: 1.0]; N

Solution Reference: https://github.com/n1k0/casperjs/issues/49#issuecomment-60430359Casper.wait (10000,function () {}), after waiting for 10s to find the address of the current page, or About:blankBut I follow the above said add Casperjs my.js--ignore-ssl-errors=yes and--ssl-protocol=any are not, finally see inside someone also met this situation.Casperjs--help found, not support--ignore-ssl-errors,--ssl-protocol these two option,phantomjs inside onlyThe feeling is not 1.1.0-beta3 this version,

This article introduces the ucenter integration, communication failure, and debugging and testing troubleshooting methods. I hope this method will be helpful to you. The failure is caused by the api/uc of your application. php may have errors. for example, ucenter rules. only uc. if the php file returns 1 normally, a message indicating successful communication is displayed. however, if you return an SQL error. instead of 1, it must be a failure prompt

[MySQL TroubleShooting] Service Startup error, A friend sent a startup error stack. When Skip_Grant_Table is started, no error is reported: The experts in the Group found out that the udf_initv UDF reported an error. But I still cannot figure out why do I need to run a UDF when the service is started? There is a piece of code in mysqld_main: If (! Opt_noacl) {# ifdef HAVE_DLOPEN udf_init (); # endif} Here, opt_noacl is the skip_grant_table p

suspended process in the background. Jobs: view the task list in the background Fg: restores the background process to the foreground. You must specify the task sequence number. Ctrl + Z combination key: suspends the current process, that is, it is transferred to the background and stops execution Terminate a process Ctrl + C: interrupt the command being executed Kill: Used to terminate the process with the specified PID. Killall: Used to terminate all processes with the specified name. The-9 o

On the Linux server, the load of the system with uptime, top view is obviously too high, and after the investigation, it is found that it is caused by the dead loop in the code. Please refer to this article for specific troubleshooting procedures.Using the top command, it is found that the load average indicator values are around 1 high. Of course, you can also use uptime. The advantage of using top is that you can see a ranking of the resources used

Article Title: Linux Server NIC Driver Installation and troubleshooting (figure ). 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. 　　 3. Set an IP address for the new Nic 　　 An alias is assigned to a Linux network device during configuration. The alias consists of a descriptive acronyms and a number. The first devi

When you start a computer, operating system, or software, the operation may fail due to memory exceptions. My computer has been in use for many years and I have summarized some troubleshooting methods for memory faults. I hope I can give you some reference. Fault 1The memory stick has poor contact with the motherboard slot, and the memory controller is faulty. The Error message "Error: Unable to Contro IA20 Line" is displayed on the screen after the h

Apache Server Installation and troubleshooting solutions After several days of installation, the entire process of installing the source code of the Apache server is roughly clear. Record it here. You are welcome to discuss it together. Thank you! The following three points are described: The whole process of installing the Apache server Cannot use an external APR with the bundled APR-util error reported during installation Port occupied error rep

When using a Windows operating system, there will always be one or another failures. How can we solve these faults? It is a difficult problem. This article lists some common troubleshooting methods and hope to help you. I. Blue Screen failures often occur in Windows This type of fault may occur in a variety of ways, sometimes when Windows is started, and sometimes when some software is running in Windows. This type of fault is generally caused by impr

When data transmission on the LAN fails, it is often difficult to determine whether it is a link fault or a port fault. Therefore, troubleshooting and isolation are required to fix faults. The following describes the simple judgment process:Take the 3700/2900 series switch as an example. On the 3700/2900 switch, it is already an IOS operating system. If a problem occurs during port transmission, run the following command on the vswitch:Sh controller E