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bruhthakuga
n00b
Joined: 10 Aug 2006
Posts: 4
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 Posted: Fri Aug 11, 2006 3:35 pm Post subject: Checkin The md5sum Of The Installation Disk That's Booted Up |
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After I boot up a Universal amd64 installation disk can I check the md5sum of the installation disk it's self?
I know that the Universal amd64 installation disk boot up processes can check the md5sum of a file downloaded from net but will it check the Universal amd64 installation disk it's self and if so how?
Below is the code for downloading and checking the md5sum of the x86 stage tarball:
Code Listing 5: Surfing to the mirror listing with links:
# links http://www.gentoo.org/main/en/mirrors.xml
Code Listing 6: Example checking integrity of a stage tarball :
# md5sum -c stage3-x86-2006.0.tar.bz2.DIGESTS |
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nixnut
Bodhisattva
Joined: 09 Apr 2004
Posts: 10974
Location: the dutch mountains
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| Posted: Fri Aug 11, 2006 5:13 pm Post subject: |
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See here.
You can't check the digest of a burned cd. You need to check the digest of the .iso file you download.
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troymc
Guru
Joined: 22 Mar 2006
Posts: 553
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| Posted: Fri Aug 11, 2006 11:51 pm Post subject: |
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Sure you can.
You should always verify your burns:
| Code: |
$ cat install-x86-minimal-2006.0.iso.DIGESTS
# MD5 HASH
9b3bfe28baac417caf3dc942ff8690e2 install-x86-minimal-2006.0.iso
# SHA1 HASH
8a9b5a43c92d4c5fde4bafa33e351d7813ee39bc install-x86-minimal-2006.0.iso
$
$
$ md5sum install-x86-minimal-2006.0.iso
9b3bfe28baac417caf3dc942ff8690e2 install-x86-minimal-2006.0.iso
$
$
$ md5sum /dev/cdrom
9b3bfe28baac417caf3dc942ff8690e2 /dev/cdrom
$
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Just md5sum the device with the CD in it. You don't have to mount it or anything.
troymc |
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nixnut
Bodhisattva
Joined: 09 Apr 2004
Posts: 10974
Location: the dutch mountains
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| Posted: Sat Aug 12, 2006 10:31 am Post subject: |
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ok, I suppose you can, but accessing raw devices is not recommended. Better do it before you burn the disk imho.
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 54300
Location: 56N 3W
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| Posted: Sat Aug 12, 2006 10:59 am Post subject: |
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nixnut,
Accessing the raw CDROM device is safe - you can't write anything that way.
Accessing raw disks is very dangerous (to the data) and should not be attempted unless you are really desperate.
Audio CDs, DVD playback etc is all done via raw device access, thats why your user needs to be in the cdrom group for it to work.
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NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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