$python manage.py shell
Python 2.5.2 (r252:60911, Apr 21 2008, 11:12:42) [GCC 4.2.3 (Ubuntu 4.2.3-2ubuntu7)] on linux2 Type "help", "copyright", "credits" or "license" for more information. (InteractiveConsole)
>>> from django.contrib.auth.models import User
>>> users=User.objects.all()
>>> users
[<User: user_name>]
>>> users[0].set_password('password');
>>> users[0].save()