Can I make my own Ubuntu distro and let people download it for free on my website
2 Answers
I think the user is asking if it is legal to do so. In that case: sure! thats why its free and open source. The only condition is that any changes or additions to the source code that you make, should also be free and open source. There are however some exceptions to that. They are related to some specific packages that are governed by different licences
This link should tell you what you need to know about that.