Python/Django run development server
It seems pretty clear that Django is unable to find your database at specified location, reasons can be,

You have created django project using "sudo" or with any other other linux user than your current user, thats why your current user might not have permissions to access that database. You can check permissions of files by typing in your project's root directory,
ls -la
You have configured wrong path for database file in your settings.py
I'm trying to create a project using Django 1.8.4 and Python 2.7.10, but I can't execute the command python manage.py runserver. I can create the project and apps, but can't run the server.
Please somebody help me, I'm new with Python/Django and I couldn't advance more.
The cmd show the next error when the command is executed.

C:\Users\Efren\SkyDrive\UniCosta\VIII\Ingeniería de Software
  II\Django\PrimerProyecto>python manage.py runserver Performing system
  checks...
System check identified no issues (0 silenced). Unhandled exception in
  thread started by  Traceback (most
  recent call last):
File "C:\Python27\lib\site-packages\django\utils\autoreload.py",
  line 225, in wrapper
      fn(*args, **kwargs)
File
  "C:\Python27\lib\site-packages\django\core\management\commands\runserver.py",
  line 112, in inner_run
      self.check_migrations()
File
  "C:\Python27\lib\site-packages\django\core\management\commands\runserver.py",
  line 164, in check_migrations
      executor = MigrationExecutor(connections[DEFAULT_DB_ALIAS])
File
  "C:\Python27\lib\site-packages\django\db\migrations\executor.py", line
  19, in init
      self.loader = MigrationLoader(self.connection)
File "C:\Python27\lib\site-packages\django\db\migrations\loader.py",
  line 47, in init
      self.build_graph()
File "C:\Python27\lib\site-packages\django\db\migrations\loader.py",
  line 182, in build_graph
      self.applied_migrations = recorder.applied_migrations()
File
  "C:\Python27\lib\site-packages\django\db\migrations\recorder.py", line
  59, in applied_migrations
      self.ensure_schema()
File
  "C:\Python27\lib\site-packages\django\db\migrations\recorder.py", line
  49, in ensure_schema
      if self.Migration._meta.db_table in self.connection.introspection.table_names(self.connection.cursor()):
File
  "C:\Python27\lib\site-packages\django\db\backends\base\base.py", line
  162, in cursor
      cursor = self.make_debug_cursor(self._cursor())
File
  "C:\Python27\lib\site-packages\django\db\backends\base\base.py", line
  135, in _cursor
      self.ensure_connection()
File
  "C:\Python27\lib\site-packages\django\db\backends\base\base.py", line
  130, in ensure_connection
      self.connect()
File "C:\Python27\lib\site-packages\django\db\utils.py", line 97, in
  exit
      six.reraise(dj_exc_type, dj_exc_value, traceback)
File
  "C:\Python27\lib\site-packages\django\db\backends\base\base.py", line
  130, in ensure_connection
      self.connect()
File
  "C:\Python27\lib\site-packages\django\db\backends\base\base.py", line
  119, in connect
      self.connection = self.get_new_connection(conn_params)
File
  "C:\Python27\lib\site-packages\django\db\backends\sqlite3\base.py",
  line 204, in get_new_connection
      conn = Database.connect(**conn_params)
django.db.utils.OperationalError: unable to open database file