On 11/9/20 4:56 PM, Jon LaBadie wrote:
BTW for doing a cksum of your burned optical disk, the device is probably
/dev/sr0 (maybe /dev/sr1 if you have a pair of optical drives). Whereever
you downloaded the .iso from should provide a "shaXXXsum" value. You can
run "sha???sum <your_.iso_file>" and "sha???sum /dev/sr0" and all 3 should
match.
That generally will not match. When reading /dev/sr0, you also read some of
the padding that gets appended to the original .iso file, and that affects
the checksum. You would need to run the "isosize" command on either the
.iso file or /dev/sr0, and then read exactly that number of 2K sectors:
dd if=/dev/sr0 bs=2k count=$(isosize /dev/sr0) | sha256sum
You can also just use the actual byte size of the .iso file and calculate
the count of 2K sectors from that.
--
Bob Nichols "NOSPAM" is really part of my email address.
Do NOT delete it.
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