以下例子是在 Centos 下开启 gzip 压缩，用于提高网页加载速度。编辑 Apache 配置文件，一般在 /etc/httpd/conf.d/ 目录里的 xxxx.conf文件，加入以下语句：
<Location />
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE application/xml
AddOutputFilterByType DEFLATE application/rss+xml
AddOutputFilterByType DEFLATE application/atom_xml
AddOutputFilterByType DEFLATE application/x-javascript application/javascript
AddOutputFilterByType DEFLATE application/x-httpd-php
AddOutputFilterByType DEFLATE text/html
</Location>重启 Apache：
# service httpd restart