how to dns lookup

1 Find the location of the command 5 Methods[[email protected] php-5.6.2]# which MySQL/usr/bin/mysql[[email protected] php-5.6.2]# Whereis MySQLMySQL:/usr/bin/mysql/usr/lib/mysql/usr/lib64/mysql/usr/include/mysql/usr/share/mysql/usr/share/man/man1/

USECANONICALNAME directive Syntax:usecanonicalname On|off|dns Default:usecanonicalname on Context:server config, virtual host, directory Override:options Compatibility:usecanonicalname is only available in Apache 1.3 and later In many situations

Yahoo! 's exceptional Performance Team has made an outstanding contribution to the Web front-end. Well-known optimization rules from 13 to 14, to 20, and now 34--really keep up with the times. The latest 34 articles are also categorized for

Yahoo gives a detailed description of the 34 rules that optimize the loading speed of the website (including the YSlow rule 22), and download the translation of the forwarded ponytail (from the Palanga image).1.Minimize HTTP requests reduces HTTP

Article turn from (Https://mp.weixin.qq.com/s/GICbiyJpINrHZ41u_4zT-A)Author | A curious MaoAddress | Http://www.jianshu.com/p/be29d679cbffStatement | This article is a curious Mao original, has been authorized to publish, without the original author'

Timing displays the time that the resource spends on each part of the request life cycle.QueueingThe time spent in the queue. Ken can because this request is considered by the rendering engine to be a lower priority resource (picture), the server is

Original: http://igoro.com/archive/what-really-happens-when-you-navigate-to-a-url/As a software developer, you will certainly have a complete hierarchical understanding of how Web applications work, as well as the technologies used in these

When you use a browser (here, for example, in Netscape's browser), sometimes after you enter the URL, after a while does not appear the page you want to visit, but some numbers or English prompts, then what do they mean? I'll list some of the

1 Domain name resolution (DNS Lookup):There's nothing to say about the time it takes to resolve a domain name to a server that specifies an IP address. 2 Creating a Connection (connection):The time required to create a TCP connection to a server or

1. Modify the/etc/resolv.conf on the server so that its contents are only similar NameServer 192.81.133.229NameServer 114.114.114.114 The resolv.conf of the problematic machine always contains addresses such as localhost or 127.0.0.1. That is,

In the process of using VSFTPD, there has always been a problem is that the FTP user logon verification is always very slow, the longest time may There will be more than a minute. Changed the configuration of various vsftp virtual users, using

1. Reduce HTTP Request: Comprehensive file: Multiple JS or css file to synthesize a JS or CSS file. Split the smaller picture into a larger image. Although the total size is the same, it can reduce the number of HTTP requests and reduce overhead.  2.

After the recent installation of MYSQL5 on a Linux server, local use of clients even the MySQL speed is very slow, local program connection is also very slow.Workaround: add skip-name-resolve under [mysqld] of the configuration file MY.CNF. The

 a summary of network analysis software Network failures have not stopped since the advent of the network. How to locate the fault quickly and accurately and keep the stable operation of the network is always the goal that people pursue. In

Article Description: for page load optimization tools, it's best to have a variety of options (better yet, a variety of free options). But you can use these tools to generate a list of Web site performance enhancements that can be manipulated. If

SMTP mail Send an example test_smtp.php Require ("smtp.php"); $SMTP =new Smtp_class; $SMTP->host_name= "mail.xiaocui.com"; $smtp->localhost= "localhost"; $from = "webmaster@xiaocui.com"; $to = "root@xiaocui.com"; if ($smtp->sendmessage

Error | Web page in your browser (here, in Netscape's browser, for example), sometimes after entering the URL, after a while does not appear you want to visit the page, but some numbers or English prompts, then what do they mean? I'll list some of

100 recommendations for MySQL tuning/optimizationMySQL is a powerful open-source database. With more and more applications on MySQL, MySQL is experiencing a bottleneck. Here are 101 recommendations for optimizing MySQL. Some techniques are suitable

100 recommendations for MySQL tuning/optimization Submitmy comments Load in have commented100 recommendations for MySQL tuning/optimization2015-07-08Database developmentDatabase Development Database Development number Dbdevs Function

When the mysql client connects to the mysql server (the process is mysqld), mysqld creates a new thread to process the request. This thread first checks whether the host name is in the host name cache. If not, the thread tries to resolve the host