Run the following command to check the status the nginx service on Ubuntu:
systemctl status nginx
The above command will give you a detailed status like this:
nginx.service - A high performance web server and a reverse proxy server Loaded: loaded (/lib/systemd/system/nginx.service; enabled; vendor prese> Active: active (running) since Sat 2022-12-11 19:25:12 UTC; 5min 11s ago Docs: man:nginx(8)