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The Natural Philosopher writes:
> So if it changes n anyway, you re bout 99% sure that the next time you
> run MD5sum against it, you will get a different answer.

More like 99.99999999999999999999999% sure.
--
John Hasler
john@dhh.gt.org
Dancing Horse Hill
Elmwood, WI USA

Hi,

what is md5sum?

I see it in all distro cds.

what is the use of it?

please explain it..

sri wrote:
> Hi,
>
> what is md5sum?
>
> I see it in all distro cds.
>
> what is the use of it?
>
> please explain it..

IIRC its way of taking a file and giving it an almost unique value,
based on its contents.

So if it changes n anyway, you re bout 99% sure that the next time you
run MD5sum against it, you will get a different answer.

Very useful in distinguishing between two versions of a file that have
the same name, and length, and knowing they re different.


But why sk me? you could have type dit into google and gotten here

http://en.wikipedia.org/wiki/Md5sum

a lot faster.

John Hasler wrote:
> The Natural Philosopher writes:
>> So if it changes n anyway, you re bout 99% sure that the next time you
>> run MD5sum against it, you will get a different answer.
>
> More like 99.99999999999999999999999% sure.
I wont quibble, but the wiki article suggests that there is a crack to
allow corrupted fies to be padded out with the right bit pattern to pass
a test..

On Thu, 24 Apr 2008 03:47:24 -0700, sri wrote:

> Hi,
>
> what is md5sum?
>
> I see it in all distro cds.
>
> what is the use of it?
>
> please explain it..

It is a utility used to generate a unique hexadecimal number, a checksum,
of a file. It is used primarily to verify that a downloaded file is the
exact duplicate of the original file, that is, the downloaded file has no
errors.

sha1sum is also another popular checksum generator.

Stef

On Thu, 24 Apr 2008 15:44:24 +0100, The Natural Philosopher wrote:

> I wont quibble, but the wiki article suggests that there is a crack to
> allow corrupted fies to be padded out with the right bit pattern to pass
> a test..

Obviously, You did not read the lines: "It is important to note that the
hash value shared by the two different files is a result of the collision
construction process. We cannot target a given hash value, and produce a
(meaningful) input bit string hashing to that given value"

http://www.win.tue.nl/hashclash/SoftIntCodeSign/


--
Regards/mvh Joachim Mæland

If everything seems under control, you're just not going fast enough.
-Mario Andretti