On Sat, 18 Nov 2006, [EMAIL PROTECTED] wrote:
>>> Did you verify the md5sum of the CD after burning it, or just the sum
>>> of the downloaded ISO file?
====================
windoze?!?! in my house!?!?! NEVER!!!
i'm a long time freebsd/linux command line guy, but new to burning CDs and
not used to doing things with a GUI (except running terminals in
x-windows). i've got a CD burner on a spare box running ubuntu.
>> just the iso. on ubuntu, how do i verify the burned CD?
>>
> Did you burn it on windows or linux? I'm afraid I only know how to
> verify a CD on Linux, and even there I have to scratch my head and try
> to remember it because I don't do it that often.
>
> A simple way to get the sum for a CD is:
>
> md5sum </dev/cdrom
>
> (where /dev/cdrom might be /dev/hdc, or however you refer to your CD rom
> drive)
>
> The problem with the simple method is that sometimes cd burners add a few
> sectors of zeros to the end of the CD. The method above adds those sectors
> to the md5sum, so it might not match even if the CD is good.
>
> Another approach uses dd to copy exactly the right number of bytes from the
> CD before sending them to md5sum. For that you need to know the size of
> the .iso file, and give dd the proper arguments so it will read only that
> many bytes.
>
> There might be a much simpler approach, depending on how far your system
> boots with the CD. Did it make it to the menu? I think there is a "check
> CD" option on the menu, but I could be mistaken.
===================
didn't make it anywhere near a menu... on one box it gave me the
"ISOLINUX" copyright and hung, and the other box it gave me that and then
a 'boot failed' message of some sort. it's like it can't find a kernel to
boot from.
i've got one box with freebsd, and one box with ubuntu. both boxes can
read CDs. on bsd:
# md5 < /dev/acd0
3f12b12ce3909219e60ff48882c89758
not good, but not definitive.
i'd like to think that there's a simple GUI way to do it on ubuntu, but i
didn't have any luck finding it.
--
...atom
________________________
http://atom.smasher.org/
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-------------------------------------------------
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nothing you can do about it, you just sort of surrender."
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Washington-based food and biotech industry consultants.
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