404 not found

i installed grav and the homepage is working.
Every other page gets a 404 not found
I already read through the troubleshooting site and i'm pretty sure i it's all correctly configured but it still wont work. .htaccess is uploaded and should be working correctly

Any help?

Let's get some details on your setup? Platform, server package, php version, etc, etc. Also how about a link to a phpinfo page?

Ubuntu 14.04 Server, LAMP, PHP version 5.5.9, grav is in the default path (/var/www/html/).

Can you please confirm that you have headers and rewrite apache modules loaded?

Then ensure you have AllowOverride All set in the main Directory block:

<Directory />
    AllowOverride All
    Require all denied
</Directory>

That will allow the .htaccess file in Grav to be processed.