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Top Forums UNIX for Dummies Questions & Answers may a corrupted .gz file be repaired? Post 95391 by JohnTinker on Wednesday 11th of January 2006 12:59:48 AM
Old 01-11-2006
may a corrupted .gz file be repaired?

Preparing for a move to a new server, I needed to offload about somewhat over a gigabyte of newsfeeds that my website collects, and that I had been saving on the server. I tarred them and zipped them into about a dozen smaller files of about 150Mb each. All seemed well. I downloaded them onto my Windows pc. The website was moved (http://schema-root.org). My plan was to move them back to the new server, strip them from their rss formats and load the news items into a database. However, in my newbieness I managed to transfer the gzipped files in ascii mode (both directions!). So they won't unzip now, either on my pc, or on the server.

Using:

> gunzip < d200512.tar.gz | tar xvf -

I was able to extract a few percent of the files from the first archive I tried, maybe a hundred of five thousand or so.

My question is: Would it be possible to get rid of the linefeed-carriage returns that were inserted into the zip file by being ftp'ed in ascii mode, back to what they were before I screwed them up? In my innocence, I am imagining that every existing linefeed byte in the original zip file (bytes that happened to be linefeeds) had a carrage return byte added after it during the ftp transfer in ascii mode. And so I am wondering whether there might be some utility somewhere that would strip them back out, and if there were such a utility, whether it would be likely to produce a zip file that could be unzipped.

Otherwise I lose a ton of newsfeeds.

Thanks for any help.
John
 

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dtc-xen_migrate(8)					      System Manager's Manual						dtc-xen_migrate(8)

NAME
dtc-xen_migrate - migrate a VPS to another Xen server SYNOPSIS
LOCAL_VPS_ID DESTINATION_HOSTNAME [ DEST_VPS_ID ] DESCRIPTION
dtc-xen_migrate This shell script is a part of the dtc-xen package that is to be used by the dtc panel to manage a Xen VPS server. Note that you need rsync in both the source and the destination dom0. This script is used to move the content of a Xen virtual machine (VM) managed with dtc-xen to another Xen server of the same type. The VM destination will first be prepared, then the local VM will be shut down, then it's content will be transfered over using rsync. Note that this is NOT a live migration, and down time of approximatively the time needed for the rsync will occure. PARAMETERS
LOCAL_VPS_ID The DTC-Xen id of the VM, from 00 to 99. DESTINATION_HOSTNAME Destination Xen server hostname to migrate to. DEST_VPS_ID Destination DTC-Xen id of the VM, from 00 to 99. EXAMPLE
dtc-xen_migrate 19 alpha.example.com 21 This will migrate the content of xen19 on the local machine to the destination server alpha.example.com using xen21 as VM name. SEE ALSO
dtc_reinstall_os(8), dtc_kill_vps_disk(8) dtc-xen_migrate(8)
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