Page not found (404)

Request Method:	GET
Request URL:	http://sudasummer.org/media/PSY_275_Abnormal_Psychology_summer_online.pdf
Raised by:	django.views.static.serve

"/home/school_web/suda/media/PSY_275_Abnormal_Psychology_summer_online.pdf" 不存在

You're seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard 404 page.