It allows you to administer your server through an simple interface.
You can even have the system install the updates automatically.
Let's replace it with a valid certificate from Let's Encrypt.
Navigate to Note: When logging in for the first time, you will see an "Invalid SSL" error.
In this tutorial, you'll install and configure Webmin on your server and secure access to the interface with a valid certificate using Let's Encrypt.
You'll then use Webmin to add new user accounts, and update all packages on your server from the dashboard.