With ssh, use these commands (copy and paste when necessary & remember to use the tab and arrow keys!):
aptitude install drupal7
Follow prompts..you will see images similar to these (Please note these images are for Drupal6, but are basically the same):
After installation is successful, use these commands:
(documentation located in /usr/share/doc/drupal7)...read by using command zcat README.Debian.gz
ln -s /etc/drupal/7/apache2.conf /etc/apache2/conf.d/drupal7.conf
/etc/init.d/apache2 restart
Point your browser to http://server.openlib.org/drupal7/install.php and follow steps to configure your site.