django 启动nginx的时候，报端口被占用的问题

Nginx [emerg] listen() to 0.0.0.0:80, backlog 511 failed (98: Address already in use)

Nginx更新后经常遇到这样的问题，解决方法：

fuser -k 80/tcp && /etc/init.d/nginx start
或
killall -9 nginx && /etc/init.d/nginx start