Install Webmin On Ubuntu 14.04

Edit file /etc/apt/sources.list,

1.  sudo nano /etc/apt/sources.list

2. add new line
deb http://download.webmin.com/download/repository sarge contrib
deb http://webmin.mirror.somersettechsolutions.co.uk/repository sarge contrib

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

4. Update Sources List
sudo apt-get update

5. Install Webmin
sudo apt-get install webmin

6. Allow port 10000
sudo ufw allow 10000