i get 404 on octobercms backend
<p>I installed october cms on ubuntu 16.04.</p>

<p>Did the installer, everything goes well, but when I try to go to the backend I get the 404 error.</p>

<p>I googled and did everything I could found:</p>

<ol>
<li>Uncommented RewriteBase / on .htaccess</li>
<li>Enabled the rewrite module</li>
<li>Added "AllowOverride All" on the .conf site file</li>
</ol>

<p>What can I do to fix this? Help!</p>