Here ya go:
Connect to your VPS server via SSH, su to root.
Start the Webmin installation by running the following command:
# vinstall webmin
During the install process, you will be prompted for various information.
Use the defaults (hit Enter when prompted) for the Config File directory, Log file directory, Full path to Perl, and Web server port.
Select an administrative user Login name. You may want to use the same name as your VPS administrator account, or use the default admin username.
Enter a password for the administrative user. Make sure the password is something you can remember. You will be prompted to re-enter the password to confirm you spelled it correctly. When entering the passwords, you will not see anything echoed on the screen.
Select YES when asked if you want to use SSL. Webmin will create its own custom certificate that it will use. If you have a custom SSL certificate, you can configure Webmin to use your certificate once Webmin is running.
In order to have Webmin restart when your server reboots, you will need to run the following command:
# mv /usr/local/etc/rc.d/webmin.sh-dist /usr/local/etc/rc.d/webmin.sh
Once you have Webmin installed, see Using Webmin for instructions on accessing and using Webmin on your VPS v2/v3.
Installing Usermin
Connect to your VPS v2/v3 server via SSH, su to root.
Use the cd command to change to the port directory for Usermin:
# cd /ports/sysutils/usermin
Run the following command to install Usermin:
# make install clean
During the install process, you will be prompted for various information.
Use the defaults (hit Enter when prompted) for the Config File directory, Log file directory, Full path to Perl, and Web server port.
Select YES when asked if you want to use SSL. Webmin will create its own custom certificate that it will use. If you have a custom SSL certificate, you can configure Webmin to use your certificate once Webmin is running.
It may take several minutes (depending on server load) for Usermin to finish the installation. Once the installation has completed, you will need to start Usermin using the following command:
# /usr/local/etc/usermin/start
In order to have Usermin restart when your server reboots, you will need to run the following command:
# mv /usr/local/etc/rc.d/usermin.sh-dist /usr/local/etc/rc.d/usermin.sh
Once you have Usermin installed, see Using Usermin for instructions on accessing and using Usermin on your VPS v2/v3.
Uninstalling Usermin and Webmin
Should you decide to remove Usermin or Webmin from your VPS v2/v3, you will need to run the uninstall.sh script in the program directory (either /usr/local/etc/usermin or /usr/local/etc/webmin). Using the pkg_delete or make deinstall tools will not completely remove these programs.