query: Ubuntu 16.04.3 update GPG error (public key not available)
positive_passages.docid: 6809
positive_passages.text: How do I fix the GPG error "NO_PUBKEY"?
negative_passages.docid: 119943
negative_passages.text: Where can I find a repository for older unsupported releases?
negative_passages.docid: 137922
negative_passages.text: Why hasn't Trusty received the updates for OpenSSL's CVE-2016-2108 and CVE-2016-2107?
negative_passages.docid: 44209
negative_passages.text: Problem with update-manager: No module named 'apt_pkg' in Ubuntu 13.10, having installed Python 3.4 on /usr/local/lib
negative_passages.docid: 53099
negative_passages.text: How to fix "-5 No address associated with hostname error" while updating?
negative_passages.docid: 140893
negative_passages.text: Error when using apt-get update
negative_passages.docid: 126538
negative_passages.text: Ubuntu 12.04 GPG error: http://archive.ubuntu.com precise Release: The following signatures were invalid: NODATA 1 NODATA 2
negative_passages.docid: 96697
negative_passages.text: Not able to generate private.key file
negative_passages.docid: 117728
negative_passages.text: sudo apt update error
negative_passages.docid: 122588
negative_passages.text: Can't connect to ubuntu archive when using apt-get update
negative_passages.docid: 64509
negative_passages.text: Can't update from official repositories [Error 409]
negative_passages.docid: 27769
negative_passages.text: Problem with IPv6 sudo apt-get update/upgrade
negative_passages.docid: 44771
negative_passages.text: What to do with KEYEXPIRED 1555048520 on updating Google Chrome and Earth repositories?
negative_passages.docid: 65
negative_passages.text: What can I do if a repository/PPA does not have a Release file?
negative_passages.docid: 123300
negative_passages.text: Invalid keystore format
negative_passages.docid: 96692
negative_passages.text: "Unable to obtain authorization for this operation" when trying to reset my default keychain
negative_passages.docid: 34069
negative_passages.text: Why am I getting authentication errors for packages from an Ubuntu repository?