As Stanislav mentioned, in post #6, there are other ways you can installed these deb packages.
However, even after you get the deb package installed, it breaks your ability to sudo apt-get update. See here: http://askubuntu.com/a/760348/256054 -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-software in Ubuntu. https://bugs.launchpad.net/bugs/1573206 Title: Ubuntu Software does not install third-party .deb packages To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/1573206/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs