First things first, I'm fairly new to this and could be making a silly mistake.

I'm running apache2 on my raspberry pi. I had a link in my HTML document to a CSS document with a background picture in it. After some trouble making any changes to the contents displayed, I eventually ended up erasing all the content in CSS document and then deleting it completely. Yet the image still displays. When I comment out the link to the (now removed) CSS document, the image that it was instructing the browser to display disappears. 

I tried restarting the system but the "ghost file" is still working.  

I'm using nano for the editing if that means anything.

The HTML-CSS link looks like  

`<link href="/css/index.css" type="text/css" rel="stylesheet">`  

Running `ls` while in /var/www/html/css returns nothing.

Please help!