我的服务器上有该文件 但是登录跳转之后报错404nginx是怎么回事？

nginxconf配置如下

worker_processes  2;

events {

worker_connections 1024;

multi_accept on;

}

http {

    include  mime.types;

default_type  application/octet-stream;

client_header_buffer_size 32k;

large_client_header_buffers 4 32k;

client_max_body_size 2048m;

server_names_hash_bucket_size 1024;

sendfile   on;

tcp_nopush on;

keepalive_timeout 60;

tcp_nodelay on;

fastcgi_connect_timeout 3600;

fastcgi_send_timeout 3600;

fastcgi_read_timeout 3600;

fastcgi_buffer_size 64k;

fastcgi_buffers 4 64k;

fastcgi_busy_buffers_size 128k;

fastcgi_temp_file_write_size 256k;

fastcgi_intercept_errors on;

gzip on;

gzip_min_length  1k;

gzip_buffers     4 16k;

gzip_http_version 1.1;

gzip_comp_level 2;

gzip_types     text/plain application/javascript application/x-javascript text/javascript text/css application/xml;

gzip_vary on;

gzip_proxied   expired no-cache no-store private auth;

gzip_disable   "MSIE [1-6]\.";

server_tokens off;

access_log off;

    server {

        listen       80;

        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {

            root   html;

            index  index.html index.htm;

        }

    }

    include vhost/*.conf; 

    #加载vhost目录下的虚拟主机配置文件

}