In this how-to, there are 4 simple commands for install Webmin on your VPS, without re-install the OS.
You need only enter this code in your terminal:
wget http://prdownloads.sourceforge.net/webadmin/webmin-1.500.tar.gz
tar xvf ./webmin-1.500.tar.gz
cd ./webmin*
sudo ./setup.shDuring installation, you shall come requested some information about the configuration to be made.
After, if you haven't changed the port, Webmin will be available at this address
http://vps-xxxx.flarevm.net:10000/.