Another very short howto on how to install Webmin on Ubuntu/Debian! 
wget http://downloads.sourceforge.net/sourceforge/webadmin/webmin_1.480_all.deb?use_mirror=kent
sudo dpkg -i webmin_1.480_all.deb
sudo apt-get -f install
sudo dpkg -i webmin_1.480_all.deb
sudo apt-get -f install
That’s all there is to it, you can now login to webmin at https://localhost:10000/ if you are connecting to it locally.
Mind you Webmin is not secure!! I only recommend this if you know how to secure your machine yourself.
I currently only use it on machines which are in a closed off LAN, never allowing connections to port 10000 from outside (the default Webmin port).
You could think about changing the port, or using SSH tunnels with a browser to connect to it.
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