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[Bug 1642386] Re: At least one invalid signature was encountered.

 

This bug was fixed in the package apt - 1.2.18

---------------
apt (1.2.18) xenial; urgency=high

  * SECURITY UPDATE: gpgv: Check for errors when splitting files (CVE-2016-1252)
    Thanks to Jann Horn, Google Project Zero for reporting the issue
    (LP: #1647467)
  * gpgv: Flush the files before checking for errors

apt (1.2.17) xenial; urgency=medium

  [ David Kalnischkies ]
  * apt-key: warn instead of fail on unreadable keyrings (LP: #1642386)
  * show apt-key warnings in apt update (Closes: 834973)

  [ Julian Andres Klode ]
  * test-releasefile-verification: installaptold: Clean up before run

apt (1.2.16) xenial; urgency=medium

  [ David Kalnischkies ]
  * avoid changing the global LC_TIME for Release writing
  * use de-localed std::put_time instead rolling our own
  * accept only the expected UTC timezones in date parsing (Closes: 819697)
  * avoid std::get_time usage to sidestep libstdc++6 bug (LP: #1593583)
  * imbue datetime parsing with C.UTF-8 locale (Closes: 828011)
  * prevent C++ locale number formatting in text APIs (try 2) (Closes: 832044)
  * prevent C++ locale number formatting in text APIs (try 3) (LP: #1611010)
    (LP: #1592817)
  * imbue .diff/Index parsing with C.UTF-8 as well

  [ Julian Andres Klode ]
  * Use C locale instead of C.UTF-8 for protocol strings
  * Add shippable.yml for CI on Shippable
  * Revert "if the FileFd failed already following calls should fail, too"
    (LP: #1641905)

 -- Julian Andres Klode <juliank@xxxxxxxxxx>  Thu, 08 Dec 2016 15:28:08
+0100

** Changed in: apt (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

** CVE added: http://www.cve.mitre.org/cgi-
bin/cvename.cgi?name=2016-1252

-- 
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https://bugs.launchpad.net/bugs/1642386

Title:
  At least one invalid signature was encountered.

Status in apt package in Ubuntu:
  Fix Released
Status in apt source package in Xenial:
  Fix Released

Bug description:
  [Summary]

  A regression in apt in Xenial 1.2.15 causes "apt-get update" to fail
  with "At least one invalid signature was encountered." if there are
  files in /etc/apt/trusted.gpg.d/ that are not readable by the _apt
  user.

  This has the consequence of getting apt "stuck"; it will not be able
  to download its own update that fixes the issue. This means that all
  affected users must apply the workaround; otherwise they will be stuck
  forever.

  [Workaround]

  Make sure all files in /etc/apt/trusted.gpg.d/ are world-readable. For
  example: "sudo chmod 644 /etc/apt/trusted.gpg.d/*". Then try "apt-get
  update" again.

  Alternatively, you can manually install the fixed version of apt using
  dpkg.

  [Impact]
  Breaks update on systems with unreadable GPG keys

  [Test case]
  Run apt update with an unreadable GPG key file in trusted.gpg.d. This should work and (stretch goal) print a warning about the key being unreadable.

  [Regression potential]
  Low risk. We check that very situation in the automated test suite now like we did a lot of other situations before. The fix has been available in apt since 1.3_rc3 on Aug 30, and there have been no regressions reported since then.

  [Original bug report]
  Hello, a recent apt update appears to have broken apt entirely.

  A coworker reported seeing troubles: http://paste.ubuntu.com/23487135/

  To test, I upgraded my laptop then immediately re-ran apt-get update
  && apt-get -u dist-upgrade:

  sarnold@hunt:~/Downloads$ sudo apt-get update && sudo apt-get -u dist-upgrade
  Hit:1 http://mirrors.kernel.org/ubuntu xenial InRelease
  Hit:2 http://mirrors.kernel.org/ubuntu xenial-updates InRelease
  Hit:3 http://mirrors.kernel.org/ubuntu xenial-security InRelease
  Ign:4 http://mirrors.kernel.org/ubuntu precise InRelease
  Get:5 http://mirrors.kernel.org/ubuntu precise-updates InRelease [55.7 kB]
  Get:6 http://mirrors.kernel.org/ubuntu precise-security InRelease [55.7 kB]
  Get:7 http://mirrors.kernel.org/ubuntu precise-proposed InRelease [55.7 kB]
  Ign:8 http://mirrors.kernel.org/ubuntu trusty InRelease
  Get:9 http://mirrors.kernel.org/ubuntu trusty-updates InRelease [65.9 kB]
  Hit:10 http://mirrors.kernel.org/ubuntu trusty-security InRelease
  Get:11 http://mirrors.kernel.org/ubuntu trusty-proposed InRelease [65.9 kB]
  Get:12 http://mirrors.kernel.org/ubuntu xenial-proposed InRelease [247 kB]
  Err:1 http://mirrors.kernel.org/ubuntu xenial InRelease
    At least one invalid signature was encountered.
  Hit:13 http://security.debian.org jessie/updates InRelease
  Err:2 http://mirrors.kernel.org/ubuntu xenial-updates InRelease
    At least one invalid signature was encountered.
  Get:14 http://mirrors.kernel.org/ubuntu yakkety InRelease [247 kB]
  Err:3 http://mirrors.kernel.org/ubuntu xenial-security InRelease
    At least one invalid signature was encountered.
  Hit:15 http://mirrors.kernel.org/ubuntu yakkety-updates InRelease
  Get:16 http://mirrors.kernel.org/ubuntu yakkety-security InRelease [93.3 kB]
  Hit:17 http://security.debian.org wheezy/updates InRelease
  Get:18 http://mirrors.kernel.org/ubuntu yakkety-proposed InRelease [95.7 kB]
  Hit:19 http://mirrors.kernel.org/ubuntu zesty InRelease
  Hit:20 http://mirrors.kernel.org/ubuntu zesty-updates InRelease
  Hit:21 http://mirrors.kernel.org/ubuntu zesty-security InRelease
  Err:5 http://mirrors.kernel.org/ubuntu precise-updates InRelease
    At least one invalid signature was encountered.
  Hit:22 http://mirrors.kernel.org/ubuntu zesty-proposed InRelease
  Hit:23 http://mirrors.kernel.org/ubuntu precise Release
  Hit:24 http://mirrors.kernel.org/ubuntu trusty Release
  Ign:25 http://archive.canonical.com/ubuntu precise InRelease
  Hit:26 http://security.ubuntu.com/ubuntu xenial-security InRelease
  Hit:27 http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu vivid InRelease
  Hit:28 http://ftp.debian.org/debian unstable InRelease
  Err:6 http://mirrors.kernel.org/ubuntu precise-security InRelease
    At least one invalid signature was encountered.
  Err:7 http://mirrors.kernel.org/ubuntu precise-proposed InRelease
    At least one invalid signature was encountered.
  Err:9 http://mirrors.kernel.org/ubuntu trusty-updates InRelease
    At least one invalid signature was encountered.
  Ign:29 http://archive.canonical.com/ubuntu trusty InRelease
  Hit:30 http://ppa.launchpad.net/snappy-dev/image/ubuntu vivid InRelease
  Hit:31 http://ftp.debian.org/debian testing InRelease
  Err:10 http://mirrors.kernel.org/ubuntu trusty-security InRelease
    At least one invalid signature was encountered.
  Err:11 http://mirrors.kernel.org/ubuntu trusty-proposed InRelease
    At least one invalid signature was encountered.
  Err:13 http://security.debian.org jessie/updates InRelease
    At least one invalid signature was encountered.
  Hit:32 http://archive.canonical.com/ubuntu xenial InRelease
  Hit:33 http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu xenial InRelease
  Ign:34 http://ftp.debian.org/debian jessie InRelease
  Err:12 http://mirrors.kernel.org/ubuntu xenial-proposed InRelease
    At least one invalid signature was encountered.
  Err:14 http://mirrors.kernel.org/ubuntu yakkety InRelease
    At least one invalid signature was encountered.
  Hit:35 http://archive.canonical.com/ubuntu yakkety InRelease
  Err:15 http://mirrors.kernel.org/ubuntu yakkety-updates InRelease
    At least one invalid signature was encountered.
  Hit:36 http://ftp.debian.org/debian jessie-updates InRelease
  Err:16 http://mirrors.kernel.org/ubuntu yakkety-security InRelease
    At least one invalid signature was encountered.
  Err:17 http://security.debian.org wheezy/updates InRelease
    At least one invalid signature was encountered.
  Hit:37 http://archive.canonical.com/ubuntu zesty InRelease
  Err:18 http://mirrors.kernel.org/ubuntu yakkety-proposed InRelease
    At least one invalid signature was encountered.
  Ign:38 http://ftp.debian.org/debian wheezy InRelease
  Err:19 http://mirrors.kernel.org/ubuntu zesty InRelease
    At least one invalid signature was encountered.
  Err:20 http://mirrors.kernel.org/ubuntu zesty-updates InRelease
    At least one invalid signature was encountered.
  Hit:39 http://archive.canonical.com/ubuntu precise Release
  Err:21 http://mirrors.kernel.org/ubuntu zesty-security InRelease
    At least one invalid signature was encountered.
  Hit:40 http://ftp.debian.org/debian wheezy-updates InRelease
  Err:22 http://mirrors.kernel.org/ubuntu zesty-proposed InRelease
    At least one invalid signature was encountered.
  Err:41 http://mirrors.kernel.org/ubuntu precise Release.gpg
    At least one invalid signature was encountered.
  Hit:42 http://archive.canonical.com/ubuntu trusty Release
  Err:43 http://mirrors.kernel.org/ubuntu trusty Release.gpg
    At least one invalid signature was encountered.
  Hit:44 http://ftp.debian.org/debian jessie Release
  Err:26 http://security.ubuntu.com/ubuntu xenial-security InRelease
    At least one invalid signature was encountered.
  Err:27 http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu vivid InRelease
    At least one invalid signature was encountered.
  Err:28 http://ftp.debian.org/debian unstable InRelease
    At least one invalid signature was encountered.
  Hit:45 http://ftp.debian.org/debian wheezy Release
  Err:30 http://ppa.launchpad.net/snappy-dev/image/ubuntu vivid InRelease
    At least one invalid signature was encountered.
  Err:31 http://ftp.debian.org/debian testing InRelease
    At least one invalid signature was encountered.
  Err:32 http://archive.canonical.com/ubuntu xenial InRelease
    At least one invalid signature was encountered.
  Err:33 http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu xenial InRelease
    At least one invalid signature was encountered.
  Err:35 http://archive.canonical.com/ubuntu yakkety InRelease
    At least one invalid signature was encountered.
  Err:36 http://ftp.debian.org/debian jessie-updates InRelease
    At least one invalid signature was encountered.
  Err:37 http://archive.canonical.com/ubuntu zesty InRelease
    At least one invalid signature was encountered.
  Err:46 http://archive.canonical.com/ubuntu precise Release.gpg
    At least one invalid signature was encountered.
  Err:40 http://ftp.debian.org/debian wheezy-updates InRelease
    At least one invalid signature was encountered.
  Err:47 http://archive.canonical.com/ubuntu trusty Release.gpg
    At least one invalid signature was encountered.
  Err:48 http://ftp.debian.org/debian jessie Release.gpg
    At least one invalid signature was encountered.
  Err:49 http://ftp.debian.org/debian wheezy Release.gpg
    At least one invalid signature was encountered.
  Fetched 981 kB in 1s (496 kB/s)
  Reading package lists... Done
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://mirrors.kernel.org/ubuntu xenial InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://mirrors.kernel.org/ubuntu xenial-updates InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://mirrors.kernel.org/ubuntu xenial-security InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://mirrors.kernel.org/ubuntu precise-updates InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://mirrors.kernel.org/ubuntu precise-security InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://mirrors.kernel.org/ubuntu precise-proposed InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://mirrors.kernel.org/ubuntu trusty-updates InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://mirrors.kernel.org/ubuntu trusty-security InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://mirrors.kernel.org/ubuntu trusty-proposed InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://security.debian.org jessie/updates InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://mirrors.kernel.org/ubuntu xenial-proposed InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://mirrors.kernel.org/ubuntu yakkety InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://mirrors.kernel.org/ubuntu yakkety-updates InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://mirrors.kernel.org/ubuntu yakkety-security InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://security.debian.org wheezy/updates InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://mirrors.kernel.org/ubuntu yakkety-proposed InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://mirrors.kernel.org/ubuntu zesty InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://mirrors.kernel.org/ubuntu zesty-updates InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://mirrors.kernel.org/ubuntu zesty-security InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://mirrors.kernel.org/ubuntu zesty-proposed InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://mirrors.kernel.org/ubuntu precise Release: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://mirrors.kernel.org/ubuntu trusty Release: At least one invalid signature was encountered.
  W: 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: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu vivid InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://ftp.debian.org/debian unstable InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://ppa.launchpad.net/snappy-dev/image/ubuntu vivid InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://ftp.debian.org/debian testing InRelease: At least one invalid signature was encountered.
  W: 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/ubuntu xenial InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu xenial InRelease: At least one invalid signature was encountered.
  W: 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/ubuntu yakkety InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://ftp.debian.org/debian jessie-updates InRelease: At least one invalid signature was encountered.
  W: 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/ubuntu zesty InRelease: At least one invalid signature was encountered.
  W: 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/ubuntu precise Release: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://ftp.debian.org/debian wheezy-updates InRelease: At least one invalid signature was encountered.
  W: 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/ubuntu trusty Release: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://ftp.debian.org/debian jessie Release: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://ftp.debian.org/debian wheezy Release: At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/xenial/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/xenial-updates/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/xenial-security/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/xenial-security/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu/dists/vivid/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://ppa.launchpad.net/snappy-dev/image/ubuntu/dists/vivid/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu/dists/xenial/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/precise-updates/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/precise-security/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/precise-proposed/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/trusty-updates/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/trusty-security/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/trusty-proposed/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/xenial-proposed/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://archive.canonical.com/ubuntu/dists/xenial/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/yakkety/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/yakkety-updates/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/yakkety-security/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/yakkety-proposed/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://archive.canonical.com/ubuntu/dists/yakkety/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/zesty/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/zesty-updates/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/zesty-security/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/zesty-proposed/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://archive.canonical.com/ubuntu/dists/zesty/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://ftp.debian.org/debian/dists/unstable/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://ftp.debian.org/debian/dists/testing/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://ftp.debian.org/debian/dists/jessie-updates/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://security.debian.org/dists/jessie/updates/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://ftp.debian.org/debian/dists/wheezy-updates/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://security.debian.org/dists/wheezy/updates/InRelease  At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/precise/Release.gpg  At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/trusty/Release.gpg  At least one invalid signature was encountered.
  W: Failed to fetch http://archive.canonical.com/ubuntu/dists/precise/Release.gpg  At least one invalid signature was encountered.
  W: Failed to fetch http://archive.canonical.com/ubuntu/dists/trusty/Release.gpg  At least one invalid signature was encountered.
  W: Failed to fetch http://ftp.debian.org/debian/dists/jessie/Release.gpg  At least one invalid signature was encountered.
  W: Failed to fetch http://ftp.debian.org/debian/dists/wheezy/Release.gpg  At least one invalid signature was encountered.
  W: Some index files failed to download. They have been ignored, or old ones used instead.
  Reading package lists... Done
  Building dependency tree
  Reading state information... Done
  Calculating upgrade... Done
  The following packages were automatically installed and are no longer required:
    linux-headers-4.4.0-21 linux-headers-4.4.0-21-generic linux-headers-4.4.0-22 linux-headers-4.4.0-22-generic
    linux-headers-4.4.0-24 linux-headers-4.4.0-24-generic linux-headers-4.4.0-28 linux-headers-4.4.0-28-generic
    linux-headers-4.4.0-31 linux-headers-4.4.0-31-generic linux-headers-4.4.0-34 linux-headers-4.4.0-34-generic
    linux-headers-4.4.0-36 linux-headers-4.4.0-36-generic linux-headers-4.4.0-38 linux-headers-4.4.0-38-generic
    linux-image-4.4.0-21-generic linux-image-4.4.0-22-generic linux-image-4.4.0-24-generic
    linux-image-4.4.0-28-generic linux-image-4.4.0-31-generic linux-image-4.4.0-34-generic
    linux-image-4.4.0-36-generic linux-image-4.4.0-38-generic
  Use 'sudo apt autoremove' to remove them.
  0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

  I'll attach the full terminal log soon.

  Thanks

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: apt 1.2.15
  ProcVersionSignature: Ubuntu 4.4.0-45.66-generic 4.4.21
  Uname: Linux 4.4.0-45-generic x86_64
  NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Wed Nov 16 12:29:54 2016
  InstallationDate: Installed on 2012-10-18 (1490 days ago)
  InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1)
  SourcePackage: apt
  UpgradeStatus: Upgraded to xenial on 2016-04-30 (200 days ago)

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