# cp webmin-1.020.tar.gz /usr/local
# cd /usr/local
# tar -zxvf webmin-1.020.tar.gz
# cd webmin-1.020
# ./setup.sh

The Webmin configuration directory
The directory in which all Webmin configuration information is stored. This is now separate from the Webmin install directory, so that configurations are saved when you upgrade.
If you have previously installed Webmin and use the same config directory, this will be the only question asked.

The Webmin log directory
The location for pid and webserver log files.

The full path to perl on your system
This is usually /usr/bin/perl or /usr/local/bin/perl

Your Operating system type
In Webmin versions 0.990 and above, this question is only asked if your operating system cannot be automatically determined.
The setup script will display a list of supported systems. If your OS is not on the list, you can try choosing the closest match. However this may not work properly, and may even cause serious problems!

Web server port
The TCP port that the Webmin web server will listen on.

Web server login and password
The login name and password used to acess the Webmin web server.

Web server hostname
The hostname of the machine on which Webmin will run.

Use SSL
This question will only be asked if your system has the Perl SSL libraries installed. See below for more..

Start Webmin at boot time
If your OS is supported, Webmin will ask if you want to have it automatically started at boot time