重启Ubuntu 14.04后，nginx不会启动

我得到这个错误：

nginx：[emerg]在/etc/nginx/sites-enabled/django.save:1中重复上游“app_server”

这是我的configuration文件：

upstream app_server { server 127.0.0.1:9000 fail_timeout=0; } server { listen 80 default_server; listen [::]:80 default_server ipv6only=on; root /usr/share/nginx/html; index index.html index.htm; client_max_body_size 4G; server_name _; keepalive_timeout 5; # Your Django project's media files - amend as required location /media { alias /home/django/django_project/django_project/media; } # your Django project's static files - amend as required location /static { alias /home/django/django_project/django_project/static; } location / { proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_redirect off; proxy_pass http://app_server; } } 

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 cd /etc/nginx/sites-enabled/ sudo rm -r django.save sudo service nginx restart * Restarting nginx nginx [ OK ]