The @drupal installer requires that you create a settings file as part of the installation process.
<ol>
<li>Copy the %default_file file to %file.</li>
<li>Change file permissions so that it is writable by the web server. If you are unsure how to grant file permissions, please consult the <a href="@handbook_url">on-line handbook</a>.</li>
</ol>
More details about installing Drupal are available in INSTALL.txt.