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Thread: No public key error

  1. #1
    Join Date
    Oct 2007
    Location
    New Delhi, India
    Beans
    99
    Distro
    Ubuntu 15.04 Vivid Vervet

    No public key error

    I use ubuntu 12.04. I get the following error when I sudo apt-get update
    Reading package lists... Done
    W: GPG error: http://archive.canonical.com precise Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
    W: GPG error: http://archive.ubuntu.com precise Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
    W: GPG error: http://archive.ubuntu.com precise-updates Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
    W: GPG error: http://archive.ubuntu.com precise-backports Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
    W: GPG error: http://archive.ubuntu.com precise-security Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
    W: GPG error: http://archive.ubuntu.com precise-proposed Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
    can someone tell me if there is a problem?
    Gunashekar
    "where knowledge is free"
    Humanity Networks
    Chennai India

  2. #2
    Join Date
    May 2010
    Location
    uk
    Beans
    9,324
    Distro
    Xubuntu 14.04 Trusty Tahr

    Re: No public key error

    Hi

    Open a terminal and type (or copy and paste)

    Code:
    sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 40976EAF437D05B5
    Enter your password. It will not be echoed to the screen.

    Then type

    Code:
    sudo apt-get update
    Kind regards
    If you believe everything you read, you better not read. ~ Japanese Proverb

    If you don't read the newspaper, you're uninformed. If you read the newspaper, you're mis-informed. - Mark Twain

    Thinking about becoming an Ubuntu Member?

  3. #3
    Join Date
    Oct 2007
    Location
    New Delhi, India
    Beans
    99
    Distro
    Ubuntu 15.04 Vivid Vervet

    Re: No public key error

    Thank you Matt.
    I did as you instructed.
    I now get the following error message at the end when I sudo apt-get update
    ....
    Reading package lists... Done
    W: GPG error: http://archive.canonical.com precise Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>
    thak you for the support. Do I still have a problem?
    guna
    Gunashekar
    "where knowledge is free"
    Humanity Networks
    Chennai India

  4. #4
    Join Date
    May 2010
    Location
    uk
    Beans
    9,324
    Distro
    Xubuntu 14.04 Trusty Tahr

    Re: No public key error

    Hi

    It's imported the key so that is progress.

    Pick a different mirror and then update again. That may help.

    I am just about to sleep though.

    Kind Regards
    If you believe everything you read, you better not read. ~ Japanese Proverb

    If you don't read the newspaper, you're uninformed. If you read the newspaper, you're mis-informed. - Mark Twain

    Thinking about becoming an Ubuntu Member?

  5. #5
    Join Date
    Oct 2007
    Location
    New Delhi, India
    Beans
    99
    Distro
    Ubuntu 15.04 Vivid Vervet

    Re: No public key error

    Thank you matt. I chose different servers.
    I still get the BADSIG error.
    Just wondering if there is a problem at all.
    have a good night
    regards
    Guna
    Gunashekar
    "where knowledge is free"
    Humanity Networks
    Chennai India

  6. #6
    Join Date
    Oct 2007
    Location
    New Delhi, India
    Beans
    99
    Distro
    Ubuntu 15.04 Vivid Vervet

    Re: No public key error

    Got rid of the problem with Method one from here http://www.ubuntugeek.com/how-to-fix...or-badsig.html
    These are the steps
    Code:
    $ sudo -i
    
        # apt-get clean
    
        # cd /var/lib/apt
    
        # mv lists lists.old
    
        # mkdir -p lists/partial
    
        # apt-get clean
    
        # apt-get update
    Gunashekar
    "where knowledge is free"
    Humanity Networks
    Chennai India

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