We have already discussed how to install ubuntu 12.10 LAMP server now we will install webmin for easy ubuntu server administartion.
Now you need to install webmin from APT repository
You need to edit the /etc/apt/sources.list file and 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
Now you need to download GPG key
sudo apt-key add jcameron-key.asc
Update source list
sudo apt-get update
Install webmin using the following command
sudo apt-get install webmin
Now you need to go to https://ubuntu-serverip:10000
Ubuntu in particular don't allow logins by the root user by default. However, the user created at system installation time can use sudo to switch to root. Webmin will allow any user who has this sudo capability to login with full root privileges.