common computer problems and solutions

For enterprise-critical applications, it is important to ensure that the system delivers services consistently and reliably, resulting in high availability requirements and high availability solutions. The following issues are common for choosing high availability solutions, especially for dual-machine hot standby scenarios: Q: What are the high availability

Build Linux ssh trust and solutions to common problems Build Linux ssh trust and solutions to common problems 1. generate an ssh private key for the local server. If it already exists, ignore it.$ Ssh-keygen-t rsaGenerating public

Sample compilation errors and solutions in the SDKCompiling environment of Sample In SDKIf you use Microsoft Visual Studio 2005, go to the tools> Options> projects and solutions> VC ++ directory and perform the following settings.Executable file:D:/program files/Microsoft Visual Studio 8/VCD:/program files/Microsoft Visual Studio 8/VC/redist/debug_nonredist/x86/Microsoft. vc80.debugmfcD:/program files/Micro

rule is that the routing fails The general rules re-ping the destination IP address.4. Ping URLsTo detect a network with a DNS service that, after pinging the IP address of the destination computer in the previous step, is still unable to connect to the machine, ping the network name of the machine, such as Ping sina.com.cn, the IP that the URL points to is normally present, which indicates that the DNS settings are correct and that the DNS server is

is simple and elegant. Details can be seen in Redis Sentinel design draft? Http://redis.io/topics/sentinel-spec. Summary: 1. It is recommended that the Master do not perform any persistence work, including memory snapshots and AOF log files. In particular, do not enable memory snapshots for persistence. 2. if data is critical, an Slave enables AOF to back up data, and the policy is to synchronize data once per second. 3. For the speed of Master-Slave replication and the stability of the connec

Common Security problems and solutions for ASP. A. CSRF (Cross-site request forgery cross-site solicitation forgery, also known as "one click Attack" or session riding, usually abbreviated as CSRF or XSRF, is a malicious use of the site) Detailed Description:http://imroot.diandian.com/post/2010-11-21/40031442584 Example: Landed on the attack

Selector 　　　{color:blue;} /* *+html prefix only supports IE7 */Note :No matter what method, the order of writing is Firefox written in front, IE7 written in the middle, IE6 written in the last side;IE6 a property after!important will destroy the previous priority.There are many other browser Hack, here to no longer introduce, a lot of tutorials, introduce a relatively clear CSS HackHttp://www.duitang.com/static/csshack.html Four, the offal1, support PNG picture transparency effect:selecto

Solutions to two common problems in ios development There are two common problems in ios development! As we all know, Apple's mobile phone uses the ios system, and the number of users is huge, so ios development has become a very popular industry. The following section descr

With the increasing popularity of IPv6, IPv6 installation and usage instructions on the network have been described in detail, but many people have not successfully installed and configured IPv6 according to their steps. The following describes some common IPv6 installation and configuration problems. First, to use IPv6, you must ensure that the IPv6-related background services are enabled. This is often th

Common Security problems and solutions for ASP. A. CSRF (Cross-site request forgery cross-site solicitation forgery, also known as "one click Attack" or session riding, usually abbreviated as CSRF or XSRF, is a malicious use of the site) Detailed Description:http://imroot.diandian.com/post/2010-11-21/40031442584 Example: Landed on the attack

turn them off and improve performance.Rdbchecksum Yes5. When the following error occurs:Virtualalloc/cowalloc fail! Out of Memory allocating 42bytes!Modified: MaxMemory 1024000000Maxheap 1024000000Redis Client Common commandsGet keySet key valueClearExists keyDel keyDbsizeLpush Key valueInfo AllInfoMonitorHgetall KeyRedis 127.0.0.1:6379> Info #查看server版本内存使用连接等信息Redis 127.0.0.1:6379> Client List #获取客户连接列表Redis 127.0.0.1:6379> client Kill 127.0.0.1:33

the width, we need to set display:block; (except that the input tag is special). With float layout and horizontal margin, under IE6, he has a bug of horizontal margin after the Block property float. However, because it is the inline attribute tag itself, so if we add display:inline, its aspect will not be set. We also need to add display:talbe behind Display:inline.Browser compatibility issue Five: Image default spacingProblem symptom: When several IMG tags are put together, some browsers will

BKJIA special article] with the release of the Community Linux version Debian7.0.0 stable version, I have downloaded and installed it like many Linux system enthusiasts. Now we have some minor problems and solutions for editing, hoping to help more Linux fans feel the stability and charm of the Linux operating system. Topic recommendations:About Debian Linux 7.0 1. Time Zone settings When Debian 7.0 is ins

write to files have been added to the VSFTPD Service program's master profile, but it does not seem to have taken effect. This is not a firewall or configuration file problems, but the default permissions of the shared directory in Mischief, in the VSFTPD service program anonymous open authentication mode, the default access to the/VAR/FTP directory. By viewing the permissions on this directory, only the root administrator has write access. No wonder

By fleshwound (http://www.smatrix.org) (Note: This is part of our complete design, and some other parts still require confidentiality. I hope this article will help the brothers who are working on the J2EE project, any questions about JAVA security and cryptography theory and application can come to our forum: http://bbs.smatrix.org) In recent years, with the popularization of Internet and computer, e-commerce and e-government have become an important

This article is based on http://www.cnblogs.com/fnng/p/3565912.html this blog post, learning to use the MYSQLDB process encountered the following problems.1. Install mysqldb when running sudo python setup.py install error environmenterror:mysql_config not foundWhen you install Mysql-python, it appears: SH: Mysql_config:not foundtraceback (most recent call Last): File"setup.py", line the,inchmetadata, Options=get_config () File"/home/zhxia/apps/source/

Summary of common Razor Problems and Solutions in Asp.net MVC, mvcrazor Preface Recently I have encountered a lot of problems in using Asp.net MVC Razor, so I want to sum up my experience. Let's take a look at the detailed introduction: 1. Datatype error message cannot be customized This may be a Bug in Asp.net MVC. Vi

1. Error: Android pre DEX: [bxg] Android SDK is not specified error reported resolved EnterFile ==> project structure ==> facets, select a project with Android, and click the minus sign to delete the project with Android. Restart the project. 2. Click the function name and you cannot jump to the corresponding function. Idea startup error plugin error problems found loading plugins solution. EnterFile => Settings => editor => plugins check all p

the configuration interface of the server, tick the options of the Publish module contexts to separate XML file option, but the method is only applicable to Tomcat6. under normal circumstances, this problem can be ignored in Tomact7, and the console will have a warning but will not affect the operation. if it does not work, then look at your webroot, that is, "Demo" above the use of Chinese? (I have witnessed the normal operation of the English after change.) ）(3) appears similar to the Apache

Common vim operation skills and solutions to problems in linux 1. common command % jump to pair brackets [[jump to the beginning of the code block (but require '{' in the code block to take a separate line) gD jumps to the definition of a local variable. ''jump to the place where the cursor was last docked. It's two ''