Here's how i finally created the ~/.android/debug.keystore file.
First some background. I got a new travel laptop. Installed Android Studio. Cloned my android project from git hub. The project would not run. Finally figured out that the debug.keystore was not created ... and i could not figure out how to get Android Studio to create it.
Finally, i created a new blank project ... and that created the debug.keystore!
Hope this helps other who have this problem.