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I am unable to install new packages or update existing packages to to Linux-image-4.15.0-32-generic, Linux-image-4.15.0-34-generic and Linux-image-4.15.0-38-generic. Error message screenshot

I have tried the solutions provided here, but it is not resolving the problem: I am having a problem with the package manager on 18.04 LTS

Is there way I can fix this problem without formatting my PC? Thanks

EDIT: Full Message on running sudo apt update:

sudo apt update Get:1 http://dl.google.com/linux/chrome/deb stable InRelease [235 B] Err:1 http://dl.google.com/linux/chrome/deb stable InRelease
Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?) Hit:2 http://archive.ubuntu.com/ubuntu bionic InRelease
Hit:3 http://ppa.launchpad.net/fish-shell/release-2/ubuntu bionic InRelease
Hit:5 http://archive.ubuntu.com/ubuntu bionic-updates InRelease
Hit:6 http://archive.ubuntu.com/ubuntu bionic-backports InRelease
Hit:7 http://ppa.launchpad.net/git-core/ppa/ubuntu bionic InRelease
Get:4 http://deb.playonlinux.com precise InRelease [2,592 B]
Hit:8 https://dl.winehq.org/wine-builds/ubuntu bionic InRelease
Hit:9 https://packages.microsoft.com/repos/vscode stable InRelease
Hit:10 http://archive.ubuntu.com/ubuntu bionic-security InRelease
Ign:11 https://download.docker.com/linux/ubuntu (lsb_release InRelease
Hit:12 http://ppa.launchpad.net/persepolis/ppa/ubuntu bionic InRelease
Hit:13 https://download.sublimetext.com apt/stable/ InRelease
Hit:14 https://download.docker.com/linux/ubuntu bionic InRelease
Err:4 http://deb.playonlinux.com precise InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 73F0D6E88E3D6C3A Hit:15 http://ppa.launchpad.net/zeal-developers/ppa/ubuntu bionic InRelease
Err:16 https://download.docker.com/linux/ubuntu (lsb_release Release
404 Not Found [IP: 52.222.253.156 443] Reading package lists... Done
E: Failed to fetch http://dl.google.com/linux/chrome/deb/dists/stable/InRelease Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?) E: The repository 'http://dl.google.com/linux/chrome/deb stable InRelease' is no longer 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://deb.playonlinux.com precise InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 73F0D6E88E3D6C3A E: The repository 'http://deb.playonlinux.com precise 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. E: The repository 'https://download.docker.com/linux/ubuntu (lsb_release Release' does not have a Release file. 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.

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  • 1
    You might have to change the main repository server as well as performing the solution you tried above.
    – Aaron Obeng
    Nov 17, 2018 at 13:34
  • 2
    I see two problems on your screenshot. 1) You seem to have deleted all your sources. Your system doesn't know where to get new packages from. askubuntu.com/a/1040799/19626 will fix that. 2) You seem to have specified kernels to install. Bad idea - let apt do that for you. Those packages are not in the Ubuntu repos anymore anyway. Use apt-mark to change those kernel packages to 'remove' status, so apt won;t try to install them anymore.
    – user535733
    Nov 17, 2018 at 13:38
  • 1
    Your actual problem seems to occur during the update process, but this can't be seen on your screenshot. Please run sudo apt update, highlight and copy the text, and paste the text into your question (rather than using a screen shot!)
    – Charles Green
    Nov 17, 2018 at 14:34
  • Charles Green, I made an edit and added the full text on running sudo apt update
    – Christian
    Nov 17, 2018 at 18:22
  • I tried all the help provided above but it didn't work. I finally fixed it by following the instructions here: Ubuntu fix broken packages to edit the dpkg status file manually.
    – Christian
    Nov 25, 2018 at 7:42

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