How come I cannot run satchmo_check?

Question

I'm stuck on step 1 of test and install the data here: http://www.satchmoproject.com/docs/dev/settings.html

When I try to run the command, I get the following error:

(pyweb27)user@mint ~/Documents/workspace/python/site $ python manage.py satchmo_check
Unknown command: 'satchmo_check'
Type 'manage.py help' for usage.

I do have satchmo installed:

(pyweb27)user@mint ~/Documents/workspace/python/site $ python
Python 2.7.5+ (default, Sep 19 2013, 13:48:49) 
[GCC 4.8.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import django; import satchmo_store;
>>> satchmo_store.get_version()
'0.9.3-pre hg-2553:76b7dccafc76'

Am I doing something wrong? How can I resolve this?