I have been unable to find an .otf version of the Ubuntu font family, only .ttf formats. I have downloaded the .ttf font files from the website.
1 Answer
Why not simply convert the ttf files to otf? There are numerous ways of doing this. The are online services or you can use, or you could also install font forge sudo apt-get install fontforge
also available through the software center. The project page for font forge is here: http://fontforge.github.io/en-US/