I developed a software product which integrates the Ubuntu system. I want to sell this software someday. Is it legal to integrate the Ubuntu system in this software product?
Do I need to pay? Or write an application to Ubuntu?
"integrate" means that I distribute my software product by a CD. And I need to integrate the Ubuntu in the CD too. And my software is run on Ubuntu system. It is an App on Ubuntu. I will not modify Ubuntu. I think I do not need to make my software open source.