To install webmin in Ubuntu 12.04, open terminal and add the following repository: 1-  Edit /etc/apt/sources.list file

sudo vi /etc/apt/sources.list

2- Add the following lines

deb http://download.webmin.com/download/repository sarge contrib 
deb http://webmin.mirror.somersettechsolutions.co.uk/repository sarge contrib

Save and exit the file 3- Now you need to import GPG key

wget http://www.webmin.com/jcameron-key.asc
sudo apt-key add jcameron-key.asc

4- Update the source list

sudo apt-get update

5- Now install webmin

sudo apt-get install webmin

Now  to access webmin open your browser and enter:  http://serverip:10000/ That`s all. via Unixmen