Ubuntu14下nginx服务器链接PHP

报错：nginx下无法打开php，报错[error] 5040#0: *1 connect() failed (111: Connection ref ...

server {
        listen 80;
        #listen 80 default_server;
        #listen [::]:80 default_server ipv6only=on;

          root /mnt/www;
          index index.html index.php index.htm;

          

          location ~ \.php(.*)$ {
           # fastcgi_pass 127.0.0.1:9000;
           # fastcgi_index index.php; 
           # fastcgi_split_path_info ^((?U).+\.php)(/?.+)$;
           # fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; 
           # fastcgi_param PATH_INFO $fastcgi_path_info;
           # fastcgi_param PATH_TRANSLATED $document_root$fastcgi_path_info;
           # include fastcgi_params;
           try_files $uri =404;
           fastcgi_split_path_info ^(.+\.php)(/.+)$;
           fastcgi_pass unix:/run/php/php5.6-fpm.sock;
           fastcgi_index index.php;
           include fastcgi_params;

          }
      }