Rewrite rule for Wordpress

[Felipe Oliveira Carvalho]

I use the same configuration on localhost and it works, but on the
server the "friendly URLs" doesn't work anyway.
Time passes and I understand less about the nginx configuration. I'm
looking for a document with good explanation about how it works.

This is my configuration:

server {
        server_name colegioosaber.com.br;
        root /var/www/osaber;   # <---- The root!

        location / {
                root /var/www/osaber;
                index index.php;

                # --> Wordpress configuration for site_osaber
                if (!-e $request_filename) {
                        rewrite  ^(.*)$  /index.php?q=$1  last;
                        break;
                }
        }

        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        location ~ \.php {
                fastcgi_param  SCRIPT_FILENAME
/var/www/osaber$fastcgi_script_name;
                include fastcgi_params; # many things here
        }
}

How can I debug nginx configuration setting process to find errors? Logs?

--
Felipe