How to Install Webmin on Ubuntu

sudo apt-get install libnet-ssleay-perl openssl libauthen-pam-perl libio-pty-perl libmd5-perl
Download Webmin:

wget http://prdownloads.sourceforge.net/webadmin/webmin_1.350_all.debIf this does not work, there is probably a newer version of Webmin. Get the link to the latest *.deb file from the Webmin site.

Install it:

sudo dpkg -i webmin_1.350_all.deb

You will get the following output:

Webmin install complete. You can now login to https://your-server-name:10000/ as root with your root password, or as any user who can use sudo to run commands as root.

Thanks to  http://techgurulive.com/2009/04/06/how-to-install-webmin-on-ubuntu/