Re: Checksum for iso image netinst i386
Wally Lepore writes:
> On Wed, Sep 26, 2012 at 10:22 PM, Wally Lepore <wallylepore@gmail.com> wrote:
> > On Wed, Sep 26, 2012 at 7:49 PM Ralf Mardorf wrote:
> > I don't know how to do that on Windows.
> > Don't you have a burning software that will show the MD5sum of the ISO?
> > If so, simply compare the sum with sum from the http links without
> software.
>
> Hi Ralf,
>
> Yes I do have software on windows called "winmd5sum" that does all
> this automatically using a different process. The Cd Burner method you
> mention is also another way. I will look into that. Also I discovered
> there are many different ways to verify that a downloaded file is
> error free. Using the program md5sum.exe is just one of many different
> methods using the command line. I simply wanted to learn this
> particular method, that's all.
Here is what I did
- Download a program to check MD5SUM on Windows:
http://www.pc-tools.net/win32/md5sums/
- I extracted the zip file into c:\md5sum on my system.
- I downloaded a netinstall image from
http://cdimage.debian.org/debian-cd/6.0.5/i386/iso-cd/
debian-6.0.5-i386-netinst.iso
- Also there was a file called MD5SUMS.txt, I download that also.
Both the iso and MD5SUMS.txt file are in my download directory.
(In this case c:\Users\testusr\Downloads)
- I ran md5sum.exe on the ISO:
c:\md5sum\md5sum.exe -u c:\Users\testusr\Downloads\debian-6.0.5-i386-netinst.iso
Note: I used the -u flag, this tells md5sum.exe to mimic the output of
the UNIX md5sum command, which was used to create MD5SUMS.txt.
OUTPUT:
C:\Users\testusr\Downloads>c:\md5sum\md5sums.exe -u c:\Users\testusr\Downloads\debian-6.0.5-i386-netinst.iso
bdf926d604258ce17dfba0b5ef067f17 *debian-6.0.5-i386-netinst.iso
- I opened a notepad session, cutting and pasting the output of the
md5sum command into a new session.
- I then opened the MD5SUMS.txt file in a seperated notepad session and
looked for the debian-6.0.5-i386-netinst.iso line:
bdf926d604258ce17dfba0b5ef067f17 debian-6.0.5-i386-netinst.iso
-I cut and pasted that line directly under the output of the md5sum command
I had put into the notepad session previously, getting the following
file:
bdf926d604258ce17dfba0b5ef067f17 *debian-6.0.5-i386-netinst.iso
bdf926d604258ce17dfba0b5ef067f17 debian-6.0.5-i386-netinst.iso
Hence, I can verify that ISO and come to the conclusion that this
is pretty darn complicated on Windows.
To double check my work, I verified on my Debian system:
mek@kuip:tmp-> md5sum -c MD5SUMS.txt 2>&1 | grep netinst
debian-6.0.5-i386-netinst.iso: OK
Hope that helps.
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