Setting-up sub-domain with Nginx

Very simple steps

1. Create a folder “sub.example.com” in /var/www/html/

2. Create a config file “sub.example.com” in etc/nginx/site-availabe

server {
        listen 80;
        listen [::]:80;

        root /var/www/html/sub.example.com;
        index index.php index.html index.htm index.nginx-debian.html; 

        server_name sub.example.com www.sub.example.com;

        location / {
                try_files $uri $uri/ =404;
        }
		location ~ \.php$ {
		    #NOTE: You should have "cgi.fix_pathinfo = 0;" in php.ini
		    include fastcgi_params;                
		    fastcgi_intercept_errors on;
		    fastcgi_pass unix:/run/php/php7.2-fpm.sock;
		    fastcgi_param SCRIPT_FILENAME 
                    $document_root/$fastcgi_script_name;
		}
}

Note php7.2-fpm may be change by your using php version 3. Run

ln -s /etc/nginx/sites-available/sub.example.com /etc/nginx/sites-enabled/sub.example.com

4. Test configuration sudo nginx -t
5. Restart the Nginx server:

sudo systemctl restart nginx

To do this you would:

1.) Create an A record on your existing domain in the DNS system for your new subdomain and point it to your droplet’s IP.

2.) Create a second (non-default) server {} block in your nginx configuration pointing to your second app.

3.) Restart nginx with the command:

service nginx restart