Disable directory listing (which is better)?

[ChenXiu]

To disable directory listing, I've found two ways:
1.) ssh command: a2dismod --force autoindex
2.) by editing apache2.conf: <Directory /var/www/> Options -Indexes ...........

Which is better? Should I do both?

Thank you.

[requinix]

Forget "better". Look at what the two options mean and decide which is more appropriate for you.

The first option prevents the autoindex ability from even existing in the first place. Use it if you don't want to allow anything to do indexes at all, ever.
The second option disables the index ability for every directory under /var/www. Use it if you don't want to enable indexes by default but might possibly want it on a case-by-case basis, eg. with a .htaccess and/or a more specific <Directory> directive somewhere.