Verifying the integrity of iso images

[jerryeguru]

I am 61% to complete my fc-6-i386-dvd.iso, i am using windows xp download manager (fresh download).

I want to download the SHA1SUM text file included with the ISO files. where do i get this? AND;

Run 'sha1sum' on each ISO and compare with the values in the file. How do i go about with this?

Thank you in advance.

[i845_]

* Complete re-write *

Within Windows, you could do this...

1. Download and open the SHA1SUM file using Notepad. You'll see something like this...


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

a_forty_character_alphanumeric_string FC-6-i386-dvd.iso

-----BEGIN PGP SIGNATURE-----
blah blah blah...
-----END PGP SIGNATURE-----


Copy the alphanumeric string into the clipboard.

2. Download and install HashTab 1.11 (http://www.beeblebrox.org/hashtab/hashtab_setup.exe).

3. Right-click on the download file, then select 'Properties' from the context menu. Within the 'Properties' dialog-box that pops up, select the 'File Hashes' tab.

4. Now paste the alphanumeric string found within the SHA1SUM file into the empty field corresponding to 'SHA1 Hash', and hit 'Compare'.

You should receive the message 'Hashes match'. This means that your file has downloaded correctly, and is error-free.

Links to SHA1SUM files are usually provided on the same page as links to their corresponding ISOs.

[DrChuck]

You don't really NEED to do this step. Very early in the Fedora installation process, you are given the option of verifying the integrity of the disk. The entire operation goes on in the background, and simply reports pass/fail, but I assume it is doing the checksum.
If you are still curious about the checksum, you could go ahead with the install, and do sha1sum (which is installed by default) on /dev/dvd from Fedora.

[i845_]

Originally posted by DrChuck:

You don't really NEED to do this step. Very early in the Fedora installation process, you are given the option of verifying the integrity of the disk. The entire operation goes on in the background, and simply reports pass/fail, but I assume it is doing the checksum.

Now why didn't I think of that...? :confused: :p

Originally posted by DrChuck:

If you are still curious about the checksum, you could go ahead with the install, and do sha1sum (which is installed by default) on /dev/dvd from Fedora.

You probably won't be able to proceed with the install in case there's a checksum mismatch, which signifies that the installation medium is corrupted.