Restarting the Django server displays the following error:
this port is already running....
This problem occurs specifically on Ubuntu and
A more simple solution just type sudo fuser -k 8000/tcp. This should kill all the processes associated with port 8000.
sudo fuser -k 8000/tcp
EDIT:
For osx users you can use sudo lsof -t -i tcp:8000 | xargs kill -9
sudo lsof -t -i tcp:8000 | xargs kill -9