nginx err_connection_refused, can anyone help me?



PHP Snippet 1:

server {
error_log /path/server.error.log;

listen 80; 
root /var/www; 
index index.html index.php index.htm index.nginx-debian.html;
server_name local...

PHP Snippet 2:

sudo tail -f /var/log/php7.*-fpm.log
ngnix.conf => php-fpm socet?
location ~ \.php$ {
fastcgi_pass unix:/var/run/php7.0-fpm.sock;
include fastcgi_params;
} 

PHP Snippet 3:

location ~ [^/]\.php(/|$) {
    ...

    fastcgi_pass    127.0.0.1:9000;
    fastcgi_index   index.php;
    include         /etc/nginx/fastcgi_params;
}

PHP Snippet 4:

location ~ [^/]\.php(/|$) {
    ....

    fastcgi_pass    unix:/var/run/php/php7.3-fpm.sock;
    fastcgi_index   index.php;
    include         /etc/nginx/fastcgi_params;
}