Dell OS Reinstall Ubuntu 7.10 DVD download problem

Mario_Limonciello at Dell.com Mario_Limonciello at Dell.com
Tue Apr 15 10:51:49 CDT 2008


Hi Duane,

What you can try doing is wget'ing with the 'continue' option.

       --continue
           Continue getting a partially-downloaded file.  This is useful when you want to finish up a download started by a previous instance of Wget, or by
           another program.  For instance:

                   wget -c ftp://sunsite.doc.ic.ac.uk/ls-lR.Z

           If there is a file named ls-lR.Z in the current directory, Wget will assume that it is the first portion of the remote file, and will ask the
           server to continue the retrieval from an offset equal to the length of the local file.

           Note that you don’t need to specify this option if you just want the current invocation of Wget to retry downloading a file should the connection
           be lost midway through.  This is the default behavior.  -c only affects resumption of downloads started prior to this invocation of Wget, and
           whose local files are still sitting around.

           Without -c, the previous example would just download the remote file to ls-lR.Z.1, leaving the truncated ls-lR.Z file alone.

           Beginning with Wget 1.7, if you use -c on a non-empty file, and it turns out that the server does not support continued downloading, Wget will
           refuse to start the download from scratch, which would effectively ruin existing contents.  If you really want the download to start from
           scratch, remove the file.

           Also beginning with Wget 1.7, if you use -c on a file which is of equal size as the one on the server, Wget will refuse to download the file and
           print an explanatory message.  The same happens when the file is smaller on the server than locally (presumably because it was changed on the
           server since your last download attempt)---because ‘‘continuing’’ is not meaningful, no download occurs.

           On the other side of the coin, while using -c, any file that’s bigger on the server than locally will be considered an incomplete download and
           only "(length(remote) - length(local))" bytes will be downloaded and tacked onto the end of the local file.  This behavior can be desirable in
           certain cases---for instance, you can use wget -c to download just the new portion that’s been appended to a data collection or log file.

           However, if the file is bigger on the server because it’s been changed, as opposed to just appended to, you’ll end up with a garbled file.  Wget
           has no way of verifying that the local file is really a valid prefix of the remote file.  You need to be especially careful of this when using -c
           in conjunction with -r, since every file will be considered as an "incomplete download" candidate.

           Another instance where you’ll get a garbled file if you try to use -c is if you have a lame HTTP proxy that inserts a ‘‘transfer interrupted’’
           string into the local file.  In the future a ‘‘rollback’’ option may be added to deal with this case.

           Note that -c only works with FTP servers and with HTTP servers that support the "Range" header.

Regards,

Mario Limonciello 
Dell | Linux Engineering 
Desk : (512) 723-0582 
Mario_Limonciello at Dell.com 



-----Original Message-----
From: linux-desktops-bounces at dell.com on behalf of duane.gaul at kodak.com
Sent: Tue 4/15/2008 8:34 AM
To: linux-desktops
Subject: Dell OS Reinstall Ubuntu 7.10 DVD download problem
 


Hi Everyone,
   I went to the Dell Ubuntu 7.10 wiki today to download the Dell OS
Reinstall Ubuntu 7.10 DVD.iso file for the Inspiron 530n with the nvidia
8600 video card. The file size is listed as 4313mb. When I start the
download process, my computer says the file size is 212 mb. At this point,
I'm not sure who to contact. Thanks for any help!

Duane




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