Install webmin on Ubuntu server (12.04 LTS)

Webmin is powerful web-based application for administering your Unix based or Windows system. With webmin, you can modify basic configuration of your server, manage cron jobs, execute commands etc.

Webmin is modular, which makes it very flexible. You can see list of standard modules of latest version from this link:
http://www.webmin.com/standard.html

First up, you should look up most recent version of webmin, you can check latest version from here:
http://freefr.dl.sourceforge.net/project/webadmin/webmin/

Download package with wget:

 wget http://freefr.dl.sourceforge.net/project/webadmin/webmin/1.620/webmin_1.620_all.deb  

Webmin is going to need some dependencies in order to install, handy way to install all required packages is to use tool called gdebi. Run gdebi as sudo against your deb packet to install all dependencies.

First you need to install packet gdebi-core:

 sudo apt-get install gdebi-core  

Then you can run it against your .deb pakcage:

 sudo gdebi webmin_1.620_all.deb  
 Requires the installation of the following packages:  
 apt-show-versions libapt-pkg-perl libauthen-pam-perl libio-pty-perl libnet-ssleay-perl  
 web-based administration interface for Unix systems  
  Using Webmin you can configure DNS, Samba, NFS, local/remote filesystems  
  and more using your web browser. After installation, enter the URL  
  https://localhost:10000/ into your browser and login as root with your root  
  password.  
 Do you want to install the software package? [y/N]:y  

Now everything should be set up and we can proceed with webmin install:

 sudo dpkg -i webmin_1.620_all.deb  
 ...  
 Webmin install complete. You can now login to https://ip-192-168-1-1:10000/  
 as root with your root password, or as any user who can use sudo  
 to run commands as root.  

Now everything should be set! You can start configuring your server from https://<your server>:10000/