The .htaccess file should be there or it's still in /var/www/silverstripe and you didn't move it. There's usually a .htaccess file involved with a SilverStripe site...
On *nix systems, files that start with a dot (.) are usually hidden. Make sure that these hidden files are also shown to you!
I know how to see hidden files, i even did a find, and it found a few, but not in /var/www (there were some in the subfolders though).
I am guessing that when i did the move, it did not move the hidden files.
I deleted the silverstripe subfolder though.
What is the next step, do i reinstall?
I created the file, but no change. Can you elaborate what should stand in RewriteBase?
Since silverstripe is sitting in /var/www which is the root folder it should remain / as it is?
Or am i mistaken, and should put /var/www ?