Apache环境中启用shtml。
1. 确认加载include.so模块，将注释去掉：
LoadModule include_module libexec/apache2/mod_include.so
此模块说明
This module provides a filter which will process files before they are sent to the client. The processing is controlled by specially formatted SGML comments, referred to as elements. These elements allow conditional text, the inclusion of other files or programs, as well as the setting and printing of environment variables.
此模块提供将要发送到客户端之前文件的过滤操作，由SGML来解释这一文件，然后这个文件简称元素，
查看httpd有没有正确加载这个模块，以方便记录可以处理的元素名单
如果没有这个模块就得重新编译apache了
这个模块的c源程序是mod_include.c
[root@localhost html]# apachectl -M|grep include
include_module (shared)
Syntax OK
2.在httpd.conf中的 AddType部分去掉这两段注释：
AddType text/html .shtml
AddOutputFilter INCLUDES .shtml
创建了这个类型的文件
3. Directory目录权限里面找到
Options Indexes FollowSymLinks
增加Includes修改为：
Options Indexes FollowSymLinks Includes
4. 重新启动httpd，测试：
<!–#include file=”head.html”–>
SHTML test!
<!–#include file=”foot.html”–>
推荐阅读：
Ubuntu Apache FastCGI 虚拟主机安装 http://www.linuxidc.com/Linux/2013-06/86691.htm
Ubuntu 下Apache安装和配置 http://www.linuxidc.com/Linux/2013-06/85827.htm
