Ign:1 http://dl.google.com/linux/chrome/deb stable InRelease
Hit:2 http://dl.google.com/linux/chrome/deb stable Release
Hit:3 http://archive.ubuntu.com/ubuntu bionic InRelease
Ign:4 http://extras.ubuntu.com/ubuntu precise InRelease
Ign:6 http://pkg.jenkins.io/debian-stable binary/ InRelease
Get:7 http://extras.ubuntu.com/ubuntu precise Release [11.9 kB]
Hit:8 http://ppa.launchpad.net/nilarimogard/webupd8/ubuntu bionic InRelease
Ign:9 http://archive.canonical.com/ubuntu precise InRelease
Ign:10 http://us.archive.ubuntu.com/ubuntu precise InRelease
Hit:11 http://pkg.jenkins.io/debian-stable binary/ Release
Get:12 http://extras.ubuntu.com/ubuntu precise Release.gpg [72 B]
Hit:14 http://archive.canonical.com/ubuntu bionic InRelease
Ign:12 http://extras.ubuntu.com/ubuntu precise Release.gpg
Get:16 http://archive.canonical.com/ubuntu precise Release [8,180 B]
Get:18 http://archive.canonical.com/ubuntu precise Release.gpg [181 B]
Ign:18 http://archive.canonical.com/ubuntu precise Release.gpg
Get:20 http://us.archive.ubuntu.com/ubuntu precise Release [49.6 kB]
Get:15 http://us.archive.ubuntu.com/ubuntu precise-security InRelease [55.7 kB]
Err:15 http://us.archive.ubuntu.com/ubuntu precise-security InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
Get:17 http://us.archive.ubuntu.com/ubuntu precise-updates InRelease [55.7 kB]
Err:17 http://us.archive.ubuntu.com/ubuntu precise-updates InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
Get:19 http://us.archive.ubuntu.com/ubuntu precise-backports InRelease [55.7 kB]
Err:19 http://us.archive.ubuntu.com/ubuntu precise-backports InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
Get:21 http://us.archive.ubuntu.com/ubuntu precise Release.gpg [198 B]
Ign:21 http://us.archive.ubuntu.com/ubuntu precise Release.gpg
Reading package lists... Done
W: GPG error: http://extras.ubuntu.com/ubuntu precise Release: The following signatures were invalid: C47415DFF48C09645B78609416126D3A3E5C1192
E: The repository 'http://extras.ubuntu.com/ubuntu precise Release' 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.
W: GPG error: http://archive.canonical.com/ubuntu precise Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
E: The repository 'http://archive.canonical.com/ubuntu precise Release' 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.
W: GPG error: http://us.archive.ubuntu.com/ubuntu precise-security InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
E: The repository 'http://us.archive.ubuntu.com/ubuntu precise-security 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.
W: GPG error: http://us.archive.ubuntu.com/ubuntu precise-updates InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
E: The repository 'http://us.archive.ubuntu.com/ubuntu precise-updates 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.
W: GPG error: http://us.archive.ubuntu.com/ubuntu precise-backports InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
E: The repository 'http://us.archive.ubuntu.com/ubuntu precise-backports 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.
W: GPG error: http://us.archive.ubuntu.com/ubuntu precise Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
E: The repository 'http://us.archive.ubuntu.com/ubuntu precise Release' 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.