1. How can I make sure that my system has no copyrighted packages?
I downloaded medibuntu and I want to retain only those that are free.
2. What applications will not work if I do the above? I have deleted the gstreamer packages that ends with multiverse.
3. Is it worth to use Ubuntu for multimedia task without the copyrighted codecs?
4. Where can I find information about copyright? For example, what country these copyright are valid.