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Version: 2006-07-23 (debian - 07/07/09)

Section: 1 (Commandes utilisateur)


common2dlf - convert Common Log Format web server log files to www DLF


common2dlf file


common2dlf converts Common Log Format web server log files to the www DLF. Common Log Format is a standard log format that was originally implemented in the CERN httpd web server but that now supported nowadays by most web servers. Apache, IIS, Boa and PureFTPD can be configured to log in that format.

If the file argument is missing, STDIN will get parsed. DLF will be printed on STDOUT.


The Common Log Format has the following format:

remotehost rfc931 authuser [date] "request" status bytes

where the fields have the following meaning:

The host that made the request. Can be an IP or a hostname.
The result of an ident lookup on the host. This is usually never used.
The authenticated username.
The timestamp of the request.
The first line of the request. Usually in the format "method request-uri http-version".

See also RFC 2616, section 5.1.

The result status of the request. i.e. 200, 301, 404, 500.
The size of the request sent to the client.

Log example:

   127.0.01 - - [11/03/2001 12:12:01 -0400] "GET / HTTP/1.0" 200 513 - francis [11/03/2001 12:14:01 -0400] "GET /secret/ HTTP/1.0" 200 1256


To process a log as produced in the common logformat:
  $ lr_run common2dlf < common.log

common2dlf will be rarely used on its own, but is more likely called by lr_log2report:

  $ lr_log2report common < /var/log/httpd/common.log


combined(2), modgzip2dlf(1), referer2dlf(1)


Joost van Baal <>, Francis J. Lacoste <> and Egon Willighagen <>, based on an idea by Edwin Groothuis


$Id:,v 1.15 2006/07/23 13:16:36 vanbaal Exp $ Copyright (C) 2000, 2001 Stichting LogReport Foundation

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program (see COPYING); if not, check with

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