以下内容转载自http://www.webmin.com/faq.html
Once you have downloaded a new module as a
.wbm file, enter the Webmin Configuration module and click on the Webmin Modules button. Then use the form at the top of the page to install the module either from the local filesystem of the server Webmin is running on, or uploaded from the client your browser is on.
模块的下载地址：