Nginx
Nginx (pronounced "engine-x") is an open source reverse proxy server for HTTP, HTTPS, SMTP, POP3, and IMAP protocols, as well as a load balancer, HTTP cache, and a web server (origin server).
The Nginx logs can be found on this location
/var/log/nginx
- access.log
- error.log
2016/11/28 16:38:37 [emerg] 102#102: a duplicate default server for 0.0.0.0:80 in /etc/nginx/sites-enabled/default:17