Nginx aktifleştirme hatası

[Burak05]

Merhabalar. Öncelikle forumda yeniyim. Böyle bir konu varsa özür dilerim. Server kurmak için Nginx i kurdum. Ama aktidleştirme hatası veriyor. Hatada şu;

● 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 Mon 2018-12-24 20:54:05 +03; 28min ago
     Docs: man:nginx(
  Process: 10254 ExecStartPre=/usr/sbin/nginx -t -q -g daemon on; master_process on; (code=exited, status=1/FAILURE)

Ara 24 20:54:05 ferhat-MS-7996 systemd[1]: Starting A high performance web server and a reverse proxy server...
Ara 24 20:54:05 ferhat-MS-7996 nginx[10254]: nginx: [emerg] unknown directive "/etc/nginx/sites-enabled/default" in /etc/nginx/nginx.conf
Ara 24 20:54:05 ferhat-MS-7996 nginx[10254]: nginx: configuration file /etc/nginx/nginx.conf test failed
Ara 24 20:54:05 ferhat-MS-7996 systemd[1]: nginx.service: Control process exited, code=exited status=1
Ara 24 20:54:05 ferhat-MS-7996 systemd[1]: nginx.service: Failed with result 'exit-code'.
Ara 24 20:54:05 ferhat-MS-7996 systemd[1]: Failed to start A high performance web server and a reverse proxy server.
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