title: Nginx: Failed to start A high performance web server and a reverse proxy server
body: <p>I try to start this service but i can´t, the error below occur:</p>
  
  <pre><code>root@zabbix:/home/appliance# 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 Wed 2018-07-25 18:33:26 UTC; 1min 27s ago
    Process: 30040 ExecStart=/usr/sbin/nginx -g daemon on; master_process on; (code=exited, status=1/FAILURE)
    Process: 30037 ExecStartPre=/usr/sbin/nginx -t -q -g daemon on; master_process on; (code=exited, status=0/SUCCESS)
  
  Jul 25 18:33:25 zabbix nginx[30040]: nginx: [emerg] listen() to [::]:80, backlog 511 failed (98: Address already in use)
  Jul 25 18:33:25 zabbix nginx[30040]: nginx: [emerg] listen() to 0.0.0.0:80, backlog 511 failed (98: Address already in use)
  Jul 25 18:33:25 zabbix nginx[30040]: nginx: [emerg] listen() to [::]:80, backlog 511 failed (98: Address already in use)
  Jul 25 18:33:26 zabbix nginx[30040]: nginx: [emerg] listen() to 0.0.0.0:80, backlog 511 failed (98: Address already in use)
  Jul 25 18:33:26 zabbix nginx[30040]: nginx: [emerg] listen() to [::]:80, backlog 511 failed (98: Address already in use)
  Jul 25 18:33:26 zabbix nginx[30040]: nginx: [emerg] still could not bind()
  Jul 25 18:33:26 zabbix systemd[1]: nginx.service: Control process exited, code=exited status=1
  
  Jul 25 18:33:26 zabbix systemd[1]: *******Failed to start A high performance web server*** and a reverse proxy server.****
  
  Jul 25 18:33:26 zabbix systemd[1]: nginx.service: Unit entered failed state.
  Jul 25 18:33:26 zabbix systemd[1]: nginx.service: Failed with result 'exit-code'.
  </code></pre>