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    [SOLVED] Sources List Problem NO PUBKEY

    This is strange. I tried:

    $ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys KEY_ID 2836CB0A8AC93F7A

    But it did not work. I commented out one source at a time to narrow down which source was causing the problem. I now have all my sources commented out and I'm still getting the following terminal print out:
    Code:
    $ sudo apt-get update
    Get:1 http://ppa.launchpad.net/kubuntu-ppa/beta/ubuntu bionic InRelease [20.7 kB]
    Err:1 http://ppa.launchpad.net/kubuntu-ppa/beta/ubuntu bionic InRelease
    The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 2836CB0A8AC93F7A
    Reading package lists... Done
    W: GPG error: http://ppa.launchpad.net/kubuntu-ppa/beta/ubuntu bionic InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 2836CB0A8AC93F7A
    E: The repository 'http://ppa.launchpad.net/kubuntu-ppa/beta/ubuntu bionic InRelease' is not signed.
    N: Updating from such a repository can't be done securely, and is therefore disabled by default.
    N: See apt-secure(8) manpage for repository creation and user configuration details.
    Here is a print out of my /etc/apt/sources.list
    Code:
    # deb cdrom:[Kubuntu 18.04 LTS _Bionic Beaver_ - Release amd64 (20180426)]/ bionic main multiverse restricted universe
    
    # See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
    # newer versions of the distribution.
    # deb http://us.archive.ubuntu.com/ubuntu/ bionic main restricted
    
    ## Major bug fix updates produced after the final release of the
    ## distribution.
    # deb http://us.archive.ubuntu.com/ubuntu/ bionic-updates main restricted
    
    ## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
    ## team. Also, please note that software in universe WILL NOT receive any
    ## review or updates from the Ubuntu security team.
    # deb http://us.archive.ubuntu.com/ubuntu/ bionic universe
    # deb http://us.archive.ubuntu.com/ubuntu/ bionic-updates universe
    
    ## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 
    ## team, and may not be under a free licence. Please satisfy yourself as to 
    ## your rights to use the software. Also, please note that software in 
    ## multiverse WILL NOT receive any review or updates from the Ubuntu
    ## security team.
    # deb http://us.archive.ubuntu.com/ubuntu/ bionic multiverse
    # deb http://us.archive.ubuntu.com/ubuntu/ bionic-updates multiverse
    
    ## N.B. software from this repository may not have been tested as
    ## extensively as that contained in the main release, although it includes
    ## newer versions of some applications which may provide useful features.
    ## Also, please note that software in backports WILL NOT receive any review
    ## or updates from the Ubuntu security team.
    # deb http://us.archive.ubuntu.com/ubuntu/ bionic-backports main restricted universe multiverse
    
    ## Uncomment the following two lines to add software from Canonical's
    ## 'partner' repository.
    ## This software is not part of Ubuntu, but is offered by Canonical and the
    ## respective vendors as a service to Ubuntu users.
    # deb http://archive.canonical.com/ubuntu/ bionic partner
    
    # deb http://security.ubuntu.com/ubuntu/ bionic-security main restricted
    # deb http://security.ubuntu.com/ubuntu/ bionic-security universe
    # deb http://security.ubuntu.com/ubuntu/ bionic-security multiverse
    So what source is my system attempting to update when they're all commented out?
    "If you're in a room with another person who sees the world exactly as you do, one of you is redundant." Dr. Steven Covey, The 7-Habits of Highly Effective People

    #2
    Originally posted by mhumm2 View Post
    This is strange. I tried:
    $ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys KEY_ID 2836CB0A8AC93F7A
    You're supposed to replace the "KEY_ID" with the actual key ID, so the correct command should be:
    Code:
    sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 2836CB0A8AC93F7A
    Originally posted by mhumm2 View Post
    So what source is my system attempting to update when they're all commented out?
    Probably a ppa source that is defined in a file in /etc/apt/sources.list.d/ directory
    Last edited by kubicle; Jun 30, 2018, 07:47 AM.

    Comment


      #3
      Kubical,

      Yep, you were right on both counts. Thanks so much.
      "If you're in a room with another person who sees the world exactly as you do, one of you is redundant." Dr. Steven Covey, The 7-Habits of Highly Effective People

      Comment


        #4
        Originally posted by mhumm2
        So what source is my system attempting to update when they're all commented out?
        I see the problem is solved, but for completeness...

        You checked /etc/apt/sources.list, but did you look in the directory /etc/apt/sources.list.d? Files in there that match *.list or *.sources are processed as well as /etc/apt/sources.list.
        Regards, John Little

        Comment

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