这是官方的安装教程

If you are using the RPM version of Webmin, first download the file from the downloads page , or run the command :
第一步wget http://prdownloads.sourceforge.net/webadmin/webmin-1.831-1.noarch.rpm
then install optional dependencies with :
第二步yum -y install perl perl-Net-SSLeay openssl perl-IO-Tty
and then run the command :
第三步rpm -U webmin-1.831-1.noarch.rpm
The rest of the install will be done automatically to the directory /usr/libexec/webmin, the administration username set to root and the password to your current root password. You should now be able to login to Webmin at the URL访问 http://localhost:10000/. Or if accessing it remotely, replace localhost with your system’s IP address.
If you want to connect from a remote server and your system has a firewall installed, see this page for instructions on how to open up port 10000.