I have a server that has several Apache VirtualHosts, and I want to add Drupal. I see that my installing drupal7 (under Ubuntu Raring on an EC2 host) let Drupal set up camp in /usr/share/drupal7. What I'm not as sure of is how to add a VirtualHost for Drupal without disturbing the existing sites.
At https://help.ubuntu.com/community/Drupal, the last command before restarting Apache2 is:
sudo cp /etc/drupal/7/apache2.conf /etc/apache2/mods-enabled/drupal.conf
I haven't run this, partially because I don't know globally if this means "Start over on a Drupal host."
How can I add an additional VirtualHost that will be Drupal-driven while leaving existing sites untouched?