what is 503

1. PrefaceThis week, learning the Linux user and group management, exposure to a lot of new things, the knowledge of the brain is a bit messy, ready to write a blog, the rationale for a solution.2. Some viewsFirst, whether it is the GUI of Windows

First, the Linux system structureLinux is an inverted tree structureEverything in Linux is a file.These files are at the top of the system directory "/"/is the root directory/directory Below is a level two directory these directories are

FTP Virtual User Server Setup:Create an account list:[Email protected] vsftpd]# echo-e "msl23\n123\nbenet\n123" >> vusers.list[email protected] vsftpd]# cat Vusers.listMsl23123Benet123[Email protected] vsftpd]#Use Db_load to turn the table into a

May 12, 2016, around 14 o'clock received a customer service notice said, "the website blew up."Open Xshell, Telnet Server, top a look at the load, the average load to more than 100, to know that usually is about 2-3.View is httpd service ran full,

Citation: 700535601xx-Informational TipsThese status codes represent a temporary response. The client should be prepared to receive one or more 1xx responses before receiving a regular response.· 100-continue the initial request has been accepted,

Comparison of HTTP 1.1 and HTTP 1.0 http://blog.csdn.net/weizhaozhe/article/details/3958945 A Web site may receive millions of user requests a day, in order to improve the efficiency of the system, HTTP 1.0 requires the browser and the server to

Turn from: http://www.cnblogs.com/zhubaoxu/archive/2008/03/17/1109315.html Although often write Ajax aspects of things, but rarely to specifically understand the XMLHttpRequest status of the meaning of each value, but in the use of Google, the

HTTP 1.1 compared to HTTP 1.0 A Web site may receive millions of user requests a day, in order to improve the efficiency of the system, HTTP 1.0 requires the browser and the server to maintain only a brief connection, every time the browser needs

Let's talk about the simple structure. Front end a nginx reverse proxy, backend a Nginx instance app for PHP ... is actually a discuz, before the CC attack is a warning script or take a CDN, but this time the attackers no longer hit traffic, but the

Through the. htaccess settings you can: Implement folder password protection, redirect, custom error page, change your file name extension, url rewrite, block IP, prohibit directory list, prohibit directory running a type of file, modify default

The status of the XMLHttpRequest object represents the state of the current HTTP request, which is a long integer data, and this article describes what it means.HTTP request status and its meaning table1XX-Information Tips100-The initial request has

Ajax|object|request| Error Ajax hacks-hack8 processing request Object Errors Allow Ajax to detect server errors and provide useful information to users.The beauty of Ajax technology is that it allows JavaScript to connect to the server without user

When a Web server responds to a request from a browser or other client, its answer generally consists of the following parts: A status row, several replies Header, a blank line, content document. Here is one of the simplest answers: The status

Dynamic | data | Database Suppose we add more shippers to the table, as shown in Listing 4 (the ShipperID column has the identity attribute and SQL Server automatically generates a value for that column). "Listing 4: Insert some records into the

Web site IIS Log is one of the most important things, because there can query the search engine crawling situation, can also learn some of their own site, can be analyzed to some of the user's antecedents, not necessarily with the flow statistics

Previous blog We installed Nginx in the/usr/local/nginx directory, its default configuration files are placed in the directory of the Conf directory, and the main configuration file nginx.conf in which the subsequent use of Nginx is basically the

Continue to share with you today (take the previous chapter)(+) Vim + file name (edit file, if the file does not exist also can be edited, but must be saved, the use of vim alone is open vim manual, the same can be editedText, but save it before you

Continue the initial request has been accepted, the customer should continue to send the remainder of the request 101 Switching Protocols Server translates the client's request to another protocol All OK, the answer document for Get and post

1XX-Informational Tips   These status codes indicate a temporary response. The client should be prepared to receive one or more 1xx responses before receiving a regular response.     0-local response succeeded.   100-continue the initial request has

This article is from my translation of the Infoq Chinese station, the original address is: Http://www.infoq.com/cn/news/2015/12/how-to-choose-http-status-codeAs we all know, each HTTP response will have a status code, but for many developers,