Why is NGINX not working on Raspberry Pi?

Question

linux

Installed NGINX on Raspberry Pi. Everything worked until the device was rebooted. Now the service won't start.

[email protected]:~ $ sudo service nginx start
Job for nginx.service failed because the control process exited with error code.
See "systemctl status nginx.service" and "journalctl -xe" for details.
[email protected]:~ $ systemctl status nginx.service
● nginx.service - A high performance web server and a reverse proxy server
   Loaded: loaded (/lib/systemd/system/nginx.service; enabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Fri 2018-08-03 22:12:46 MSK; 9s ago
     Docs: man:nginx(8)
  Process: 2883 ExecStartPre=/usr/sbin/nginx -t -q -g daemon on; master_process on; (code=exited, status=1/FAILURE)

Aug 03 22:12:46 raspberrypi systemd[1]: Starting A high performance web server and a reverse proxy server...
Aug 03 22:12:46 raspberrypi nginx[2883]: nginx: [emerg] a duplicate default server for 0.0.0.0:80 in /etc/nginx/sites-enabled/default.save:22
Aug 03 22:12:46 raspberrypi nginx[2883]: nginx: configuration file /etc/nginx/nginx.conf test failed
Aug 03 22:12:46 raspberrypi systemd[1]: nginx.service: Control process exited, code=exited status=1
Aug 03 22:12:46 raspberrypi systemd[1]: Failed to start A high performance web server and a reverse proxy server.
Aug 03 22:12:46 raspberrypi systemd[1]: nginx.service: Unit entered failed state.
Aug 03 22:12:46 raspberrypi systemd[1]: nginx.service: Failed with result 'exit-code'.

Answer 1

You edited /etc/nginx/sites-enabled/default then something went wrong and the file /etc/nginx/sites-enabled/default.save was not deleted on save. Delete this file and you will be happy :)