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Thread: Hou to use Checksums?

  1. #1
    Join Date
    Dec 2007
    Location
    Jyväskylä, Suomi Finland
    Beans
    1,266
    Distro
    Ubuntu 12.04 Precise Pangolin

    Hou to use Checksums?

    Ubunteros,

    I found on:

    http://www.wilderssecurity.com/showthread.php?t=323210

    A non pae Ubuntu 12.04 iso

    There are apparently Checksums associated with it... eg:

    md5sum:
    e857a7ccde6d6a85b2080d285ee48023 ubuntu-12.04-desktop-i386-nonpae.iso
    sha256sum:
    047ca71b469a23dce844ba1571a6eae4c64e7e24527449f94d 0fb6402676ced1 ubuntu-12.04-desktop-i386-nonpae.iso

    But I don't know how to use them.

    Would someone mind teaching me?

    Thanks,

    Suomalainen

  2. #2
    Join Date
    Apr 2008
    Location
    Southern California, USA
    Beans
    Hidden!
    Distro
    Ubuntu Development Release

    Re: Hou to use Checksums???

    From a terminal type md5sum <file>.iso. Example:
    Code:
    md5sum gnome-saucy-desktop-amd64.iso
    edit:
    Code:
     md5sum --help or  man md5sum
    Last edited by VMC; September 22nd, 2013 at 05:02 PM.
    AMD64 Athlon X2 Dual-Core - nVidia Geforce 6150 SE - 4GB DDR3 | remove_old_kernels

  3. #3
    Join Date
    Dec 2007
    Location
    Jyväskylä, Suomi Finland
    Beans
    1,266
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Hou to use Checksums???

    Thanks for the terminal commands which yielded

    :~/Desktop$ md5sum ubuntu-12.04-desktop-i386-nonpae.iso
    e857a7ccde6d6a85b2080d285ee48023 ubuntu-12.04-desktop-i386-nonpae.iso

    To me it looks like two additional lines from the checksum are missing? Or am I missing something?

    Thanks

  4. #4
    Join Date
    Jul 2010
    Location
    ozarks, Arkansas, USA
    Beans
    8,874
    Distro
    Xubuntu 14.04 Trusty Tahr

    Re: Hou to use Checksums???

    md5sum:
    e857a7ccde6d6a85b2080d285ee48023 ubuntu-12.04-desktop-i386-nonpae.iso <-source documentation
    e857a7ccde6d6a85b2080d285ee48023 ubuntu-12.04-desktop-i386-nonpae.iso <- command output

    Thus the .iso file "ubuntu-12.04-desktop-i386-nonpae.iso" is validated in that it is unchanged on your download as to what is original at the
    source.

    sha256sum:
    From the manual:
    compute and check SHA256 message digest
    DESCRIPTION
    Print or check SHA256 (256-bit) checksums. With no FILE, or when FILE is -,
    read standard input
    See:
    https://help.ubuntu.com/community/HowToSHA256SUM

    different from md5sum check .

    many paths to an end
    THE current(cy) in Documentation:
    https://help.ubuntu.com/community/PopularPages

    Happy ubutu'n !

  5. #5
    Join Date
    Dec 2007
    Location
    Jyväskylä, Suomi Finland
    Beans
    1,266
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Hou to use Checksums???

    Thanks everyone for the help and clarification on this. Much appreciated!

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