CodeIgniter - How to hide index.php from the URL

Question

This is what my .htaccess looks like. The .htaccess is sitting in /www/scripts directory which is the parent of codeigniter's system directory and which also contains index.php. I have enabled mod_rewrite in my Apache 2.2.x. This is on Ubuntu 9.10 server.

I followed this link, but it does not work. Is there anything I need to do in apache2, any specific configuration so that this works?

RewriteEngine on 
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f 
RewriteCond %{REQUEST_FILENAME} !-d 
RewriteRule ^(.*)$ index.php/$1 [QSA,L]

Answer 1

use this:

RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ /folder/index.php/$1 [L]

Answer 2

Just toss the following code into your .htaccess file

RewriteEngine on
RewriteCond $1 !^(index\.php|images|robots\.txt)
RewriteRule ^(.*)$ /index.php/$1 [L]

Source: http://codeigniter.com/user_guide/general/urls.html