apache 2.2 - .htaccess & httpd.conf

I'm trying to get the directories in my /var/www/html/ directory to not show the "index of..." and all files residing in it. Do I need to edit httpd.conf and put .htaccess files in each directory to ensure the contents are hidden? I have Apache version 2.2.3 on CentOS 5.

Is this the part of httpd.conf I need to edit?

    AllowOverride None
    Options IncludesNoExec
    AddOutputFilter Includes html

    AddHandler type-map var
    Order allow,deny
    Allow from all
    LanguagePriority en es de fr
    ForceLanguagePriority Prefer Fallback

Do I put a .htaccess file with this in each directory?

Options -Indexes 

Answer

If you can edit the main config file then add -Indexes to your Options line

Options IncludesNoExec -Indexes

and restart your apache service.

It's doing this because there is no DirectoryIndex file. You could just put a blank index.html file in your directory. You could add the -Indexes to a .htaccess too.