message “File not found.” when trying to install nginx / owncloud

I’m trying to use nginx as a webserver for my owncloud installation. According to this tutorial, I created the following config file:

server {
        listen 59476;
        server_name mydomain.de;

        root /home/owncloud/www/;

        access_log  /home/owncloud/log/nginx.access.log;
        error_log  /home/owncloud/log/nginx.error.log debug;

        client_max_body_size 10G; # set max upload size
        fastcgi_buffers 64 4K;

        rewrite ^/caldav(.*)$ /remote.php/caldav$1 redirect;
        rewrite ^/carddav(.*)$ /remote.php/carddav$1 redirect;
        rewrite ^/webdav(.*)$ /remote.php/webdav$1 redirect;

        index index.php;
        error_page 403 = /core/templates/403.php;
        error_page 404 = /core/templates/404.php;

        location = /robots.txt {
            allow all;
            log_not_found off;
            access_log off;
        }
        location = /favicon.ico {
            access_log off;
            log_not_found off;
        }

        location ~ ^/(data|config|\.ht|db_structure\.xml|README) {
                deny all;
        }

        location / {
                # The following 2 rules are only needed with webfinger
                rewrite ^/.well-known/host-meta /public.php?service=host-meta last;
                rewrite ^/.well-known/host-meta.json /public.php?service=host-meta-json last;

                rewrite ^/.well-known/carddav /remote.php/carddav/ redirect;
                rewrite ^/.well-known/caldav /remote.php/caldav/ redirect;

                rewrite ^(/core/doc/[^\/]+/)$ $1/index.html;

                try_files $uri $uri/ index.php;
        }

        location ~ ^(.+?\.php)(/.*)?$ {
                try_files $1 = 404;

                include fastcgi_params;
                fastcgi_param SCRIPT_FILENAME $document_root$1;
                fastcgi_param PATH_INFO $2;
                fastcgi_pass unix:/var/run/php5-fpm.sock;
        }

        # Optional: set long EXPIRES header on static assets
        location ~* ^.+\.(jpg|jpeg|gif|bmp|ico|png|css|js|swf)$ {
                expires 30d;
                # Optional: Don't log access to assets
                access_log off;
        }
}

But when I visit the website http://mydomain.de:59476 I only get the error Message “File not found.”. Since I set the debug level to “debug”, I get the following extensive log file http://pastebin.com/uy7jHQQs. I think the most important line is

2013/08/03 17:23:21 [error] 29508#0: *3 FastCGI sent in stderr: "Primary script unknown" while reading response header from upstream, client: 37.24.146.15, server: mydomain.de, request: "GET / HTTP/1.1", upstream: "fastcgi://unix:/var/run/php5-fpm.sock:", host: "mydomain.de:59476"

Which, as I understood nginx, means that the file that nginx tries to execute does not exist. But the log also said:

2013/08/03 17:23:21 [debug] 29508#0: *3 fastcgi param: "SCRIPT_FILENAME: /home/owncloud/www/index.php"

and the file /home/owncloud/www/index.php does exist.

To check if nginx alone works correctly, I set up another website without owncloud and everything works perfectly (including PHP support) with the following configuration:

server {
        listen 59477;
        server_name mydomain.net;
                root   /home/born/web/nginx;
                index index.php;

        # Logging --
        access_log  /home/myuser/logs/nginx.access.log;
        error_log  /home/myuser/logs/nginx.error.log notice;

        # serve static files directly
        location ~* ^.+.(jpg|jpeg|gif|css|png|js|ico|html|xml|txt)$ {
            access_log        off;
            expires           max;
        }

        location ~ \.php$ {
            try_files $uri =404;
            fastcgi_pass unix:/var/run/php5-fpm.sock;
            fastcgi_index index.php;
            include /etc/nginx/fastcgi_params;
        }
}

and the the following fastcgi_params

fastcgi_param   QUERY_STRING            $query_string;
fastcgi_param   REQUEST_METHOD          $request_method;
fastcgi_param   CONTENT_TYPE            $content_type;
fastcgi_param   CONTENT_LENGTH          $content_length;

fastcgi_param   SCRIPT_FILENAME         $request_filename;
fastcgi_param   SCRIPT_NAME             $fastcgi_script_name;
fastcgi_param   REQUEST_URI             $request_uri;
fastcgi_param   DOCUMENT_URI            $document_uri;
fastcgi_param   DOCUMENT_ROOT           $document_root;
fastcgi_param   SERVER_PROTOCOL         $server_protocol;

fastcgi_param   GATEWAY_INTERFACE       CGI/1.1;
fastcgi_param   SERVER_SOFTWARE         nginx/$nginx_version;

fastcgi_param   REMOTE_ADDR             $remote_addr;
fastcgi_param   REMOTE_PORT             $remote_port;
fastcgi_param   SERVER_ADDR             $server_addr;
fastcgi_param   SERVER_PORT             $server_port;
fastcgi_param   SERVER_NAME             $server_name;

fastcgi_param   HTTPS                   $https;

# PHP only, required if PHP was built with --enable-force-cgi-redirect
fastcgi_param   REDIRECT_STATUS         200;

Answer

sudo -u nginx ls /var/run/php5-fpm.sock

sudo -u nginx ls /home/owncloud/www/index.php

Attribution
Source : Link , Question Author : born , Answer Author : Marco