I was trying to install gloobus-preview following this site: http://ubuntuhandbook.org/index.php/2013/08/install-gloobus-preview-in-ubuntu-13-04/
The problem is that when I try to install the packages - gloobus-preview and gloobus-sushi - the Terminal writes that the packages where not found, although it found the repository. I'm running Ubuntu 13.10. What do I have to do?