Apache service configuration explained in detail

Apahce configuration instructions can be divided into two blocks, core instructions and instructions provided by third parties. In apache, each instruction corresponds to a module, and among all modules, the most important ones are core_module, so_module, http_module, and mpm modules. Except for so_moudle, other modules cannot be turned off or disabled.

1: httpd.conf

(1) Main server part

1, ServerName: Define the apache default host name, you can Is the domain name or IP address

2, ServerRoot: used to define the directory where the server is located, this path is usually specified by --prefix during configuration

3, DocumentRoot: used to specify Apache provides the root directory of the page service. This path must be an absolute path rather than a relative path. If there are spaces, it needs to be enclosed in quotation marks.

4. ServerAdmin: The address to send an email to the administrator after a server error.

5, ServerAlias ​​and Alias: are all used to map directories, but ServerAlias ​​identifies the mapped directory as a CGI script directory and treats all files in this directory as CGI scripts. But Alias ​​is just mapped to a normal directory

6, User and Group: used to define the user and user group used to run the apache child process

7, Listen: used to define the listening apache Port number

8, LoadModule command: used to load modules or target files LoadModule cgi_module modules/mod_cgi.so_module

9, ErrorDocument: Custom error page information ErrorDocument 500 "unknown error" ErrorDocument 404 "/var/server/www/cgi-bin/missing_404.pl" ErrorDocument 402 http://www.nicky.com/error_402.html

10. options: Determine which directories to use those features , these features are as follows:

None: The option command will not take effect

ExecCGI: Allows execution of CGI scripts in the current directory

Includes: Allows the use of SSI functions

IncludesNOEXEC: The SSI function is allowed, but the exec cgi and exec cmd functions are disabled.

Indexes: Enable the index function. For example, if a request is made to the directory URLz and there is no index file specified by the DirectoryIndex directive, the server will Automatically return a list of requested directory contents

FollowSymLinks: Allows the use of symbolic links in the current environment, but will be ignored in the Location container

All: Uses all features except MultiViews, also options The default parameters

MultiViews: used to start the multi-view function provided by the mod_negotiations module

11, ServerTokens: OS/Major/Full affects the detail of the error footer information, and is generally not recommended.

(2) Container part
1, Container: The container acts on the module. It will first determine whether the module is loaded, and then decide whether to process it, that is Only when the judgment result is true, the instructions in the container will be executed. On the contrary, if it is false, all will be ignored. You can use or to determine whether the module is loaded

<IfModule mpm_netware_module><br> DirectoryIndex index.html <br></IfModule>

If loaded Enter then execute
<IfModule! mpm_netware_module><br> DirectoryIndex index.html <br></IfModule>
If not loaded, execute

2 Container: encapsulates only when a set of conditions is true The effective instructions act on server config, virtual host, directory, .htaccess. The difference from IfModule is that it is judged based on whether the module is loaded, but IfDefine is judged based on conditions

Based on

<IfDefine Proxy>

LoadModule proxy_module modules/libproxy.so

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