Web网站别名配置是被经常使用的一个特性。这个功能实际上是为站点URI定义一个路径映射关系，其配置和使用也较为简单。以下是基于CentOS 7下实现alias的别名配置，供大家参考。
配置示例
[root@centos7-web ~]# more /etc/redhat-release
CentOS Linux release 7.2.1511 (Core) [root@centos7-web ~]# httpd -v
Server version: Apache/2.4.6 (CentOS)
Server built: Nov 19 2015 21:43:13###关闭selinux
[root@centos7-web ~]# setenforce 0[root@centos7-web ~]# vim /etc/httpd/conf/httpd.conf## Alias: Maps web paths into filesystem paths and is used to# access content that does not live under the DocumentRoot.# Example:# Alias /webpath /full/filesystem/path## If you include a trailing / on /webpath then the server will# require it to be present in the URL. You will also likely# need to provide a <Directory> section to allow access to# the filesystem path.Alias /bbs "/forum/htdocs"<Directory "/forum/htdocs">Options Indexes FollowSymLinks MultiViewsAllowOverride allRequire all granted
</Directory> 上述别名的配置，就是说当你基于你的站点访问http://www.yourdoamin.com/bbs目录下的文件时，会直接从服务器/forum/htdocs目录下访问对应的文件。[root@centos7-web ~]# systemctl reload httpd
[root@centos7-web ~]# mkdir -pv /forum/htdocs/
mkdir: created directory ‘/forum/htdocs/’
[root@centos7-web ~]# echo "This is a alias path test.">>/forum/htdocs/index.html[root@centos7-web ~]# curl http://localhost/bbs/index.html
This is a alias path test.如果alias路径中指定的尾部目录斜线，如下，应两者匹配
Alias /bbs/ "/forum/htdocs/"
<Directory "/forum/htdocs/">Options Indexes FollowSymLinks MultiViewsAllowOverride allRequire all granted
</Directory>