Remove Index.php CodeIgniter Url On Ubuntu 11.04

1. Preliminary Note
I'm running all the steps in this tutorial with root privileges, so make sure you're logged in as root:

sudo su

2. Enable mod_rewrite module on apache
First enable the module as follows:

a2enmod rewrite

Change all occurrence of "AllowOverRide None" to "AllowOverRide All". Basically all "None" to "All" in the following file:

gedit /etc/apache2/sites-available/default

Restart Apache:

/etc/init.d/apache2 restart

3. Open file config.php on CodeIgniter (application\config\)
Remove index.php on $config['index_page'] = "index.php";

$config['index_page'] = "";

4. Make file .htaccess on CodeIgniter root directory
Fill the file with this code :

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

Now Index.php on CodeIgniter Url disappear