Codeigniter 404 page not found - apache

Question

I have been developing a Codeigniter website locally for with a WAMP server on Windows, everything working fine. I uploaded the files to a Ubuntu server to a virtual directory and configuration the URL and .htaccess. The rewrite rule works like it should but now I get 404 when I try to access the site or any other controller link. The logs state that it cannot find the controller, I checked the files to make sure they were uploaded correctly.
At this point and I at a loss, I have a hunch that it is a configuration issue with Apache but I have checked all the configs that I know. What would cause a 404 error?
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
# Removes index.php from ExpressionEngine URLs
RewriteCond %{THE_REQUEST} ^GET.*index\.php [NC]
RewriteCond %{REQUEST_URI} !/system/.* [NC]
RewriteRule (.*?)index\.php/*(.*) /$1$2 [R=301,NE,L]
# Directs all EE web requests through the site index file
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ /index.php/$1 [L]
</IfModule>

Answer 1

You have activated the module rewrite? If not, turn it on and restart wamp.
Also try to put index.php before the controller, may resolve the problem.

Answer 2

In CI 3.0, All Class names must have the first letter capitalized with the rest of the name lowercase.
Example: Where Model_name is the name of your class, this is how the class should be;
class User_model extends CI_Model {
public function __construct()
{
parent::__construct();
}
}
Then, the model should be loaded like this in the controller;
$this->load->model('user_model');
Please refer to this link: http://www.codeigniter.com/userguide3/general/models.html