@mehrdad said: in publish process there is a part that ask licence file (list of numbers) first, what is the syntax of this file? That is an Ubuntu-specific requirement, so most users on this forum don't know the answer. maybe, i also ask this question in stackoverflow but i think i have better chance to find a qt programmer that published an app in software center. The Ubuntu SDK is built on on top of Qt, so most Ubuntu app publishers know Qt. Your best chance is to ask at http://askubuntu.com/ Good luck!