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Revision as of 14:45, 13 October 2010 by Mkrizek (talk | contribs)


This test is intended to verify that the posted ISO media matches the published sha256sum.

How to test

  1. Download the .iso media files you wish to test
  2. Download the matching CHECKSUM file. For example, Fedora-12-Beta-i386-CHECKSUM.
  3. Validate that the published CHECKSUM match the downloaded ISO files by running the command sha256sum. For example, you might type:
    sha256sum -c Fedora-12-Beta-i386-CHECKSUM
  4. Validate the md5sum imprinted inside the ISO image by running the command checkisomd5 (if not available on your system, then "yum install Package-x-generic-16.pngisomd5sum"). For example, to check all ISO files, you might type:
    for ISO in Fedora-*.iso ; do echo "= $ISO =" ; checkisomd5 $ISO ; echo; done
    (Note: This check is not available for Live images)

Expected Results

  1. The command sha256sum should return OK results. For example:
    $ sha256sum -c Fedora-12-Beta-i386-CHECKSUM
    Fedora-12-Beta-i386-DVD.iso: OK
    Fedora-12-Beta-i386-disc1.iso: OK
    Fedora-12-Beta-i386-disc2.iso: OK
    Fedora-12-Beta-i386-disc3.iso: OK
    Fedora-12-Beta-i386-disc4.iso: OK
    Fedora-12-Beta-i386-disc5.iso: OK
    Fedora-12-Beta-i386-netinst.iso: OK
  2. The command checkisomd5 should indicate that it is OK to use this media for each ISO image. For example:
    The media check is complete, the result is: PASS.
    It is OK to use this media.