Cheetah is web-platform that must be installed to a web-server. This is a quick set of generic installation instructions. If, at any stage, you need more details use the Cheetah Detailed Install Guide.
Before installation, make sure your have the following:
Download the current version of Cheetah to your local computer or directly to your hosting server. Once you have downloaded, you should decompress (unzip) the Cheetah archive file.
Create a database for Cheetah on your web server, as well as a MySQL user who has all privileges for accessing and modifying it.
Most hosts offer simple interface to create databases and database users. For example, if your web host has cPanel you probably can see phpMyAdmin in the main menu or a the section labeled Databases. Just create an empty database that the Cheetah installer will later fill with tables and data.
Upload all the Cheetah files to the desired location on your web server using FTP. If you've downloaded Cheetah to your server directly, move them using shell.
Run the Cheetah installation script by accessing install/index.php in a web browser.
Installation instructions should appear in your browser. Follow them carefully to complete the installation (setting permissions, specifying server details, setting cron jobs, etc).
Login to your web-server via FTP or shell and delete /install folder - this is an important step for your site security.
Cheetah comes with a free Media Server software, based on Red 5. Media Server is required for media streaming features of some Cheetah modules. Cheetah Certified Hosting Providers already have it installed.
License is required if you want to remove Cheetah reference banner from your site. You can buy a license here.
Cheetah is now installed and is ready to use. Login to your Admin Panel at /administration and follow "Initial Steps" tutorial to install your first modules and configure basic settings of your new site. Good luck with your new venture!