Jaunty Jackalope (RESOLVED)

[NoOp]

On 11/02/2009 07:07 PM, NoOp wrote:
> On 11/02/2009 06:50 PM, Karl Auer wrote:
>> On Mon, 2009-11-02 at 16:02 -0800, NoOp wrote:
>>> > No. The md5sum will change when you transfer the iso.
>> 
>> Why? The .iso is just a file, shouldn't it always have the same md5sum?
>> In fact, if it doesn't, what is the point of the md5sum?
>> 
>> Not contradicting you, just surprised and curious.
>> 
>> Regards, K.
>> 
>> 
> 
> Can't find the exact thread just now, but I do recall a thread where
> this was discussed & made a point of it in this thread back in March:
> https://lists.ubuntu.com/archives/ubuntu-users/2009-March/176290.html

Here is a recent real life example. I downloaded the most recent karmic
liveCD so that I could test an inplace reinstall on karmic for Emil
Payne (see the "Dist Upgrade" thread. Note to Emil - works with Karmic
live CD BTW so there is hope).

I now check the md5sum of the iso:

$ md5sum ubuntu-9.10-desktop-i386.iso
8790491bfa9d00f283ed9dd2d77b3906  ubuntu-9.10-desktop-i386.iso

and see that it matches:
http://releases.ubuntu.com/karmic/MD5SUMS
8790491bfa9d00f283ed9dd2d77b3906 *ubuntu-9.10-desktop-i386.iso

Now I burn the iso to a cd & check the md5sum of that cd:
$ md5sum /dev/cdrom
8790491bfa9d00f283ed9dd2d77b3906  /dev/cdrom

And I've just now proven myself wrong :-( The md5sum of the CD matches
that of the iso. So apologies to the list, and to John Graddy. I'll
still see if I can find the thread tomorrow, but mea culpa & apologies
to all.