Drupal pretty URLs on Ubuntu

Ubuntu helpfully provides Drupal in its repositories. This installed fine for me but during install.php (to configure drupal) pretty urls wouldn't work.

To fix this, I had to edit

/etc/drupal/6/htaccess

find the line at the bottom:

#  RewriteBase /drupal

remove the '#' and add a '6' onto the end to give:

RewriteBase /drupal6