Nginx combined log format and parameter explanation

Because lnmp does not customize the log format by default, it uses the combined default format:

'$remote_addr - $remote_user  [$time_local]  '
' "$request"  $status  $body_bytes_sent  '
' "$http_referer"  "$http_user_agent" ';

Parameter explanation:

• $remote_addr, $http_x_forwarded_for
  record the client IP address.
• $remote_user
  records the client user name.
• $request
  records the requested URL and HTTP protocol.
• $status
  records the status of the request.
• $body_bytes_sent
  the number of bytes sent to the client, not including the size of the response header.
• $http_referer
  records which page link is visited from.
• $http_user_agent
  records information about the client browser.
• $bytes_sent
  the total number of bytes sent to the client.
• $connection
  the serial number of the connection.
• $connection_requests
  the number of requests currently obtained through a connection.
• $msec
  log write time. The unit is seconds and the precision is milliseconds.
• $pipe
  if the request is sent via HTTP pipelined, the pipe value is “p”, otherwise it is “.”.
• $request_length
  the length of the request (including request line, request header and request body).
• $request_time
  request processing time, the unit is seconds, the precision is milliseconds.
• $time_iso8601
  the local time in the ISO8601 standard format.
• $time_local
  the local time in the common log format.