(The problem to follow is solved: see #5 below)
Hi!
Could anybody please help me to understand why the lftp command answers as though the above path (...) is always found by the lftp -c find command? Concretely here is my two steps attept to download the KNOPPIX_V4.0.2DVD-2005-09-23-EN.iso file:
Step 1: Make sure about the path to the aimed .iso fileThe machin's answer to this request is the expected one: confirming the pathway http://ftp.gwdg.de/pub/linux/knoppx/...5-09-23-EN.iso
Step 2: Ask for the actual downloading from the already found pathway:Here is the answer which I cannot understandRemark 1. I similarly fail whenever trying any other mirror instead of http://ftp.gwdg.de/.
Remark 2. Other downloaders (such as KGet or the one of Firefox) do successfully access the aimed source, therefore one cannot suspect a firewall obstruction.
What about and how should I fix that?
Thanks in advance!

Hmm. I tried those links in firefox. After browsing the host (ftp.gwdg.de) there is no file /pub/linux/knoppix/dvd/KNOPPIX_V4.0.2DVD-2005-09-23-EN.iso, hence the 404.

You're missing the "i" in the word "knoppix" on the links, if you write it right, it works.

Thanks odevans and gbonvehi for your answers!
However
Remark on odevans' answer. Yes, the URL http://ftp.gwdg.de/pub/linux/knoppix...5-09-23-EN.iso is completely valid (denying access doesn't mean the file does not exist). To completely make sure about the existence of the file pub/linux/knoppix/dvd/KNOPPIX_V4.0.2DVD-2005-09-23-EN.iso at http://ftp.gwdg.de/ you may proceed step by step as follows:
Step 1 Open an Internet browser (Firefox say) and access http://www.knoppix.com
Step 2 Click on the "Download" icon from there
Step 3 Click on the "http" choice associated with the ftp.gwdg.de link
Step 4 At this point you are at the "KNOPPIX download agreement" page; so do click on the ">>>Accept>>>" button
Step 5 Now you are at an index of directories and files: so do click on dvd/
Step 6 Now you are at the "Index of /pub/linux/knoppix/dvd" page. Put your mouse finger on KNOPPIX_V4.0.2DVD-2005-09-23-EN.iso and concomitantly have a look at the bottom of your screen, to see the actual URL of that file: indeed it reads http://ftp.gwdg.de/pub/linux/knoppix...5-09-23-EN.iso therefore that URL is valid.
Remark on gbonvehi's answer. The missing "i" of "knoppix" is only a mistake in my post from above but, when I experienced the failure of the commandI have not missed that "i". However you answered me as "You're missing the "i" in the word "knoppix" on the links, if you write it right, it works." Please do make precise: have you realy run the right command and thereby verified its success? I have run it but it failed to open the aimed file (see the already mentioned message concerning the "Access Failed").
The same failure with other URLs. Since the Knoppix mirrors may rise access problems, I have chosen to also verify the lftp command for UBUNTU mirrors. So I have run (as root) the following commandand received the same failure messagethough I did verify the direct access (by Firefox) to the http://ftp.heanet.ie/pub/ubuntu-cdim...y-dvd-i386.iso file
Any other idea about this experience with lftp?
Thanks!

I've learned the right use of lftp command by following the tutorial at http://lftp.yar.ru/; most likely, the tutorial at http://www.linuxplanet.com/linuxplan...orials/4809/2/ may also be used (however I didn't verify this one). Any way, the use of lftp command is rather technical therefore the above "common sense" answers of odevans and gbonvehi say nothing at all in the matter.