Checksum Fedora 7 Error

kevin tough · #1 9th June 2007, 01:39 AM

I have download with Torrents, HTTP , or Ftp the Fedora 7 64bit install DVD iso. Yes I have probably downloaded now at least 10 images. I have burnt the image and had the install program verify the disk as OK . I am using fc6 and the burn program K3b to create my images. The md5 checksum that K3b reports is dd60e7a7f7895cdb2432a4b82f7a5bb1. This appears to be correct but not the value indicated that accompanies the downloads.
Please save the server bandwidth and if you receive from K3b the checksum I have mentioned above you are on track.
Md5 Checksums:
F-7-x86_64-DVD.iso dd60e7a7f7895cdb2432a4b82f7a5bb1

F-7-x86_64-rescuecd.iso 7f6c3737448a0dad5018fee358d82c6f

Fedora-7-Live-x86_64.iso fbf35e72f95f0613df93d41db507f251

F-7-i386-DVD.iso 355bdb01b0268a4bb7c757f2737dcf7c

F-7-i386-rescuecd.iso 36286975ebcff369dfa160ef280d0cf3

Fedora-7-Live-i686.iso 95554a5488a6f497b688d411c9f5f43c

Namaste,

Kevin Tough

stoat · #2 9th June 2007, 02:42 AM

Hello kevin tough,

Quote:

Originally Posted by kevin tough

The md5 checksum that K3b reports is dd60e7a7f7895cdb2432a4b82f7a5bb1. This appears to be correct but not the value indicated that accompanies the downloads.

You should be using sha1sum to generate the checksum on the ISO file, not md5sum. You have been comparing an md5sum checksum to a sha1sum. They are not the same.

Seve · #3 9th June 2007, 02:50 AM

Hello:
stoat is correct.

The MD5sum of the iso is
dd60e7a7f7895cdb2432a4b82f7a5bb1 F-7-x86_64-DVD.iso
the SHA1sum of the iso is
7cdbd9e1bed9cc9ce2c7970abeaca4da08d2994a F-7-x86_64-DVD.iso

so it that is what you are seeing [Md5sum] in k3b, you should be good to go

Seve

kevin tough · #4 9th June 2007, 03:24 AM

Fedora and Redhat supply these checksums. I cannot find a setting to change the type of checksum that K3b calculates. What other software does a Fedora user use to burn iso images?? Am I doing it the unusual way?

Namaste,
Kevin Tough

stoat · #5 9th June 2007, 03:45 AM

Quote:

Originally Posted by kevin tough

I cannot find a setting to change the type of checksum that K3b calculates. What other software does a Fedora user use to burn iso images?? Am I doing it the unusual way?

I think you are doing things correctly. And, if you like using K3b, I say use it (I am not familiar with it). But if it also generates the checksums that you are using to confirm an ISO, and it only generates md5sum checksums, then when you need a sha1sum checksum, just generate the sha1sum checksum manually with the sha1sum command in a terminal (what a sentence!). I have always done that checksum business manually anyway.

Seve · #6 9th June 2007, 03:53 AM

Hello:
To set your mind at ease
open a terminal and cd to the directory where you have the iso image, then
type
sha1sum F-7-x86_64-DVD.iso
and then type
md5sum F-7-x86_64-DVD.iso
and compare the both;
The output of sha1sum F-7-x86_64-DVD.iso to : ftp://download.fedora.redhat.com/pub...64/iso/SHA1SUM
and the output of :
md5sum F-7-x86_64-DVD.iso
to what is calculated in k3b

Seve

kevin tough · #7 9th June 2007, 07:35 AM

Thanks for clueing me in on this one. I would naturally then suspect that the sha1sum might be more robust or accurate methond as it is the choice of the RedHat/Fedora developers. Now I can check with the proper method, great.
Many thanks,
Kevin Tough

RahulSundaram · #8 10th June 2007, 02:56 AM

Quote:

Originally Posted by kevin tough

Thanks for clueing me in on this one. I would naturally then suspect that the sha1sum might be more robust or accurate methond as it is the choice of the RedHat/Fedora developers. Now I can check with the proper method, great.
Many thanks,
Kevin Tough

Yes, SHA1SUM is indeed much more robust. See http://www.cits.rub.de/MD5Collisions/

CyberCop · #9 5th April 2008, 02:47 PM

hello all, i have download fedora-7-i386-dvd.iso a i start the installation when on the desktop appear a warnning and says insert the fedora cd in cdrom i have check my iso file with the sha1sum und i have got this
6ee4688ad5710ba76577452389d4674c26861ff6 F-7-i386-DVD.iso
but the sh1sum from the ftp is
96b13dbbc9f3bc569ddad9745f64b9cdb43ea9ae F-7-i386-DVD.iso
can i fix this problem please help me ?

stoat · #10 5th April 2008, 05:12 PM

Quote:

Originally Posted by CyberCop

i have download fedora-7-i386-dvd.iso a i start the installation when on the desktop appear a warnning and says insert the fedora cd in cdrom

Hello CyberCop,

Firstly, it is not clear (to me anyway) what you are doing. Did you burn the ISO image to a DVD, or are you attempting to do the Hard Drive alternative installation method using the ISO file itself?

Quote:

Originally Posted by CyberCop

i have check my iso file with the sha1sum und i have got this
6ee4688ad5710ba76577452389d4674c26861ff6 F-7-i386-DVD.iso
but the sh1sum from the ftp is
96b13dbbc9f3bc569ddad9745f64b9cdb43ea9ae F-7-i386-DVD.iso
can i fix this problem please help me ?

But most importantly, this SHA-1 hash issue suggests that your ISO download is corrupted. Now these two things (not being able to install and a bad SHA1SUM match) may not be related. However, I would never proceed to use an ISO by any method if its SHA-1 hash did not match the one in the text file SHA1SUM.

So, first I recommend that you download the ISO file again and start over. If you have download bandwidth or speed problems, try downloading the LiveCD instead. You can install to the hard drive from that, too.