how to disable directory indexing in ubuntu Apache2, virtual hosting?

1, greg@SS:~$ sudo vim /etc/apache2/sites-available/yourwebsite.com


ServerAdmin xxxxx@gmail.com
ServerName yourwebsite.com
ServerAlias www.yourwebsite.com

DocumentRoot /var/www/vhosts/yourwebsite.com/htdocs
Options -Indexes

ErrorLog /var/www/vhosts/yourwebsite.com/log/error.log
LogLevel warn

CustomLog /var/www/vhosts/yourwebsite.com/log/access.log combined



2, restart apache service
sudo /etc/init.d/apache2 stop
sudo /etc/init.d/apache2 start