Forbidden You don't have permission to access / on this server.

Редактируем конфиг апача

# sudo gedit /etc/apache2/apache2.conf

Добавляем

<Directory /home/your_user/>
      Options Indexes FollowSymLinks
      AllowOverride None
      Require all granted
</Directory>

Перезагружаем апач

# sudo service apache2 restart