apache Options Directive 详解
一直搞不太清楚apache在配置虚拟主机时的一些选项，今天特意去翻看了apache的官方Document，终于可以很详尽地查看官方的解释了：主要看下Options的一些配置选项，如下：
The Options directive controls which server features are available in a particular directory.
option can be set to None, in which case none of the extra features are enabled, or one or more of the following:
AllAll options except for MultiViews. This is the default setting.ExecCGIExecution of CGI scripts using mod_cgi is permitted.FollowSymLinksThe server will follow symbolic links in this directory.Even though the server follows the symlink it does not change the pathname used to match againstsections.
The FollowSymLinks and SymLinksIfOwnerMatchOptions work only insections or .htaccess files.
Omitting this option should not be considered a security restriction, since symlink testing is subject to race conditions that make it circumventable.
IncludesServer-side includes provided by mod_include are permitted.IncludesNOEXECServer-side includes are permitted, but the #exec cmd and #exec cgi are disabled. It is still possible to #include virtual CGI scripts from ScriptAliased directories.IndexesIf a URL which maps to a directory is requested, and there is no DirectoryIndex (e.g., index.html) in that directory, then mod_autoindex will return a formatted listing of the directory.MultiViewsContent negotiated "MultiViews" are allowed using mod_negotiation.SymLinksIfOwnerMatchThe server will only follow symbolic links for which the target file or directory is owned by the same user id as the link. 有很多选项，其中我想用的最多就是FollowSymlinks、Indexes和Includes了，下面我们来一个一个看：
1.All 这个配置选项是默认配置，意思是除了MultiViews选项其他所有选项都有。
2.ExecCGI 表明使用mod_cgi执行CGI脚本被允许
3.FollowSymlinks 填写该选项后，服务器会跟踪指定目录的符号连接，下面的说明表示该选项不会改变被使用在中的路径，而且这个选项和SymlinksIfOwnerMatch选项只在和.htaccess中有效。
4.Includes 被mod_include提供的服务器端的引入被允许,至于服务器端的引入详见http://httpd.apache.org/docs/current/howto/ssi.html，主要就是提供一种向已存在的HTML文档中添加动态内容的方式。
5.IncludesNOEXEC 服务器端引入被允许，但是#exec cmd和#exec cgi被禁用。
6.Indexes 如果映射到一个目录的url被请求，并且在那个目录中没有所指定的DirectoryIndex，那么mod_autoindex就会返回一个格式化的目录列表。
7.MultiViews MultiViews被允许使用mod_negotiation.
8.SymLinksIfOwnerMatch 服务器只跟随那些被同一个用户id拥有的目标文件或者目录作为连接。
谢谢。
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