5.35. ErrorLogErrorLog specifies the file where server errors are logged. By default, this directive is set to/var/log/httpd/error_log.5.36. LogLevelLogLevel sets how verbose the error messages in the error logs are. LogLevel can be set(from least verbose to most verbose) to emerg, alert, crit, error, warn, notice, info, ordebug. The default LogLevel is warn.5.37. LogFormatThe LogFormat directive configures the format of the various Web server log files. The actualLogFormat used depends on the settings given in the CustomLog directive (refer toSection 5.38, “CustomLog”).The following are the format options if the CustomLog directive is set to combined:%h (remote host's IP address or hostname)Lists the remote IP address of the requesting client. If HostnameLookups is set to on, theclient hostname is recorded unless it is not available from DNS.%l (rfc931)Not used. A hyphen - appears in the log file for this field.%u (authenticated user)Lists the username of the user recorded if authentication was required. Usually, this is notused, so a hyphen - appears in the log file for this field.%t (date)Lists the date and time of the request.%r (request string)Lists the request string exactly as it came from the browser or client.%s (status)Lists the HTTP status code which was returned to the client host.%b (bytes)Lists the size of the document.%\"%{Referer}i\" (referrer)Lists the URL of the webpage which referred the client host to Web server.%\"%{User-Agent}i\" (user-agent)Lists the type of Web browser making the request.LogLevel173
