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I hope Jerry does not mind making some comments and suggestions?open a terminal and convert to root by command sudo sufor me, after running apt-get update I see that I do not have the same issue as OP but am on a diff server list....showing above and below results to show no errorsQuoteHit:10 http://archive.canonical.com xenial InRelease Hit:11 http://repo.linuxliteos.com/linuxlite citrine InRelease Hit:12 http://ppa.launchpad.net/nemh/systemback/ubuntu xenial InReleasesuggestion this is one way to fix the GPG errors for technomancercopy and paste this into your root powered terminal and I show my resultQuote#!/bin/shLIST="40976EAF437D05B5 3B4FE6ACC0B21F32 22AAEA0A86A02625 "for Z in $LIST do gpg --recv-key $Z && gpg -a --export $Z | apt-key add - doneCode: [Select]# my result root@asus:/home/gordon# #!/bin/shroot@asus:/home/gordon# LIST="40976EAF437D05B5 3B4FE6ACC0B21F32 22AAEA0A86A02625 "root@asus:/home/gordon# for Z in $LIST> do > gpg --recv-key $Z && gpg -a --export $Z | apt-key add - > donegpg: requesting key 437D05B5 from hkp server keys.gnupg.netgpg: key 437D05B5: public key "Ubuntu Archive Automatic Signing Key <[email protected]>" importedgpg: no ultimately trusted keys foundgpg: Total number processed: 1gpg: imported: 1OKgpg: requesting key C0B21F32 from hkp server keys.gnupg.netgpg: key C0B21F32: public key "Ubuntu Archive Automatic Signing Key (2012) <[email protected]>" importedgpg: no ultimately trusted keys foundgpg: Total number processed: 1gpg: imported: 1 (RSA: 1)OKgpg: requesting key 86A02625 from hkp server keys.gnupg.netgpg: key 86A02625: "Jerry Bezencon (Linux Lite) <[email protected]>" not changedgpg: Total number processed: 1gpg: unchanged: 1OKroot@asus:/home/gordon# If you see 3 successful OKs then run as root command Code: [Select]apt-get update and hopefully you have eliminated those gpg errors
Hit:10 http://archive.canonical.com xenial InRelease Hit:11 http://repo.linuxliteos.com/linuxlite citrine InRelease Hit:12 http://ppa.launchpad.net/nemh/systemback/ubuntu xenial InRelease
#!/bin/shLIST="40976EAF437D05B5 3B4FE6ACC0B21F32 22AAEA0A86A02625 "for Z in $LIST do gpg --recv-key $Z && gpg -a --export $Z | apt-key add - done
# my result root@asus:/home/gordon# #!/bin/shroot@asus:/home/gordon# LIST="40976EAF437D05B5 3B4FE6ACC0B21F32 22AAEA0A86A02625 "root@asus:/home/gordon# for Z in $LIST> do > gpg --recv-key $Z && gpg -a --export $Z | apt-key add - > donegpg: requesting key 437D05B5 from hkp server keys.gnupg.netgpg: key 437D05B5: public key "Ubuntu Archive Automatic Signing Key <[email protected]>" importedgpg: no ultimately trusted keys foundgpg: Total number processed: 1gpg: imported: 1OKgpg: requesting key C0B21F32 from hkp server keys.gnupg.netgpg: key C0B21F32: public key "Ubuntu Archive Automatic Signing Key (2012) <[email protected]>" importedgpg: no ultimately trusted keys foundgpg: Total number processed: 1gpg: imported: 1 (RSA: 1)OKgpg: requesting key 86A02625 from hkp server keys.gnupg.netgpg: key 86A02625: "Jerry Bezencon (Linux Lite) <[email protected]>" not changedgpg: Total number processed: 1gpg: unchanged: 1OKroot@asus:/home/gordon#
apt-get update
deb http://repo.linuxliteos.com/linuxlite/ citrine main
sudo apt-get update
apt-get update[sudo] password for technomancer: Hit:1 http://repo.steampowered.com/steam precise InReleaseHit:2 http://us.archive.ubuntu.com/ubuntu xenial InRelease Hit:3 http://repo.linuxliteos.com/linuxlite citrine InRelease Hit:6 http://ppa.launchpad.net/nemh/systemback/ubuntu xenial InRelease Hit:7 http://archive.canonical.com xenial InRelease Hit:8 http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease Err:2 http://us.archive.ubuntu.com/ubuntu xenial InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32Get:4 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease [94.5 kB] Get:5 http://security.ubuntu.com/ubuntu xenial-security InRelease [94.5 kB] Hit:9 http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu xenial InRelease Err:3 http://repo.linuxliteos.com/linuxlite citrine InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 22AAEA0A86A02625Hit:10 http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu xenial InRelease Err:7 http://archive.canonical.com xenial InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32Err:8 http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32Err:4 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32Err:5 http://security.ubuntu.com/ubuntu xenial-security InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32Fetched 189 kB in 1s (161 kB/s)Reading package lists... DoneW: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://us.archive.ubuntu.com/ubuntu xenial InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://repo.linuxliteos.com/linuxlite citrine InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 22AAEA0A86A02625W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://archive.canonical.com xenial InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://security.ubuntu.com/ubuntu xenial-security InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/xenial/InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/xenial-updates/InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/xenial-backports/InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/xenial-security/InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32W: Failed to fetch http://archive.canonical.com/dists/xenial/InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32W: Failed to fetch http://repo.linuxliteos.com/linuxlite/dists/citrine/InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 22AAEA0A86A02625W: Some index files failed to download. They have been ignored, or old ones used instead.
# deb http://us.archive.ubuntu.com/ubuntu/ xenial main restricted# deb http://us.archive.ubuntu.com/ubuntu/ xenial-updates main restricted# deb http://security.ubuntu.com/ubuntu xenial-security main restricted# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to# newer versions of the distribution.deb http://us.archive.ubuntu.com/ubuntu/ xenial main restricted# deb-src http://us.archive.ubuntu.com/ubuntu/ xenial main restricted## Major bug fix updates produced after the final release of the## distribution.deb http://us.archive.ubuntu.com/ubuntu/ xenial-updates main restricted# deb-src http://us.archive.ubuntu.com/ubuntu/ xenial-updates main restricted## 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## universe WILL NOT receive any review or updates from the Ubuntu security## team.deb http://us.archive.ubuntu.com/ubuntu/ xenial universe# deb-src http://us.archive.ubuntu.com/ubuntu/ xenial universedeb http://us.archive.ubuntu.com/ubuntu/ xenial-updates universe# deb-src http://us.archive.ubuntu.com/ubuntu/ xenial-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/ xenial multiverse# deb-src http://us.archive.ubuntu.com/ubuntu/ xenial multiversedeb http://us.archive.ubuntu.com/ubuntu/ xenial-updates multiverse# deb-src http://us.archive.ubuntu.com/ubuntu/ xenial-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/ xenial-backports main restricted universe multiverse# deb-src http://us.archive.ubuntu.com/ubuntu/ xenial-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 xenial partner# deb-src http://archive.canonical.com/ubuntu xenial partnerdeb http://security.ubuntu.com/ubuntu xenial-security main restricted# deb-src http://security.ubuntu.com/ubuntu xenial-security main restricteddeb http://security.ubuntu.com/ubuntu xenial-security universe# deb-src http://security.ubuntu.com/ubuntu xenial-security universedeb http://security.ubuntu.com/ubuntu xenial-security multiverse# deb-src http://security.ubuntu.com/ubuntu xenial-security multiversedeb http://archive.canonical.com/ xenial partner# deb-src http://archive.canonical.com/ xenial partner
Reading package lists...Building dependency tree...Reading state information...Calculating upgrade...The following packages will be upgraded: libmysqlclient20 libmysqlclient20:i386 linux-firmware lshw mysql-common5 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.Need to get 34.4 MB of archives.After this operation, 1,092 kB of additional disk space will be used.WARNING: The following packages cannot be authenticated! lshw mysql-common libmysqlclient20:i386 libmysqlclient20 linux-firmwareE: There were unauthenticated packages and -y was used without --allow-unauthenticated