Manage.py : Unknown command: 'migrate'
This is likely caused by following the 1.7 (DEV version) tutorial when we all get the last stable version (1.6) installed by pip.
It would not appear migrate is even a part of 1.7 in general!
Maybe the following command solve your problem: python manage.py syncdb
So either follow 1.6 tutorial or follow the instructions to install the 1.7 dev version of Django.