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Create some empty files, and change permissions so that the following directories and files are writable by the web server user. In most cases For Debian/Ubuntu this is www-data:www-data:

cd var/www/core/trunk
sudo touch application/configs/application.ini application/configs/zend.ini public/.htaccess
sudo chown -vwww-data:www-data cache
sudo chown www-data:www-data cache data/* languagesmails
sudo chown www-data:www-data uploads
sudo chown www-data:www-data public/includes
sudo chown -v www-data:www-data public/.htaccess
sudo chown www-data:www-data application/configs/*application.ini

Apache2

• Designate a vhost to CORE and make sure it runs SSL
• Enable mod_rewrite
• Enable mod_deflate (optional)
• Point the DocumentRoot to the 'public' subdirectory of the source, so in this case /var/www/core/trunk/public.
  The vhost can contain one conference, or multiple conferences, in which case you can use the ServerAlias statement. For example:

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