502 Bad Gateway instead of Welcome to Nginx - what's the problem?

Question

linux

Installed and started nginx:
sudo apt-get install nginx
sudo /etc/init.d/nginx start
502 Bad Gateway is displayed instead of a greeting. As far as I understand, you need to go by IP, which can be obtained with the ip address show command? In response, I received the following text, from which I pulled out 192.168.10.2.
But when I go to 192.168.10.2 or 192.168.10.2:8000, the error is the same. What could be the problem? The /var/www/html/ folder contains both index.html and index.nginx-debian.html. Maybe in the settings themselves I lost something I needed while experimenting (tried to install the site)? Reinstalled nginx, did not help.

Answer 1

A 502 Bad Gateway error means that Nginx is unable to receive a response from some service. Gateway means that the error did not occur within the server itself, but somewhere at the level of communication between it and another program.
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