First, I used this command Sudo apt update The result was this
sudo apt update
Hit:1 http://security.ubuntu.com/ubuntu xenial-security InRelease
Hit:2 http://archive.canonical.com/ubuntu xenial InRelease
Ign:3 http://dell.archive.canonical.com/updates xenial-dell-service InRelease
Ign:4 http://dell.archive.canonical.com/updates xenial-dell-vegas-kbl InRelease
Ign:5 http://dell.archive.canonical.com/updates xenial-dell InRelease
Hit:6 http://dell.archive.canonical.com/updates xenial-dell-service Release
Hit:8 http://dell.archive.canonical.com/updates xenial-dell-vegas-kbl Release
Hit:10 http://dell.archive.canonical.com/updates xenial-dell Release
Ign:12 http://dl.google.com/linux/chrome/deb stable InRelease
Hit:13 http://archive.ubuntu.com/ubuntu xenial InRelease
Hit:14 http://dl.google.com/linux/chrome/deb stable Release
Hit:15 http://archive.ubuntu.com/ubuntu xenial-updates InRelease
Hit:16 https://d3nt0h4h6pmmc4.cloudfront.net/ubuntu bionic InRelease
Hit:17 http://archive.ubuntu.com/ubuntu xenial-backports InRelease
Ign:18 http://archive.ubuntu.com/ubuntu trusty InRelease
Hit:20 http://archive.ubuntu.com/ubuntu trusty Release
Get:21 https://dl.winehq.org/wine-builds/ubuntu xenial InRelease [6,259 B]
Err:21 https://dl.winehq.org/wine-builds/ubuntu xenial InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 76F1A20FF987672F
Hit:23 https://repo.skype.com/deb stable InRelease
Ign:24 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial InRelease
Get:25 http://download.opensuse.org/repositories/Emulators:/Wine:/Debian/xUbuntu_16.04 ./ InRelease [1,562 B]
Err:25 http://download.opensuse.org/repositories/Emulators:/Wine:/Debian/xUbuntu_16.04 ./ InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY DFA175A75104960E
Hit:26 http://ppa.launchpad.net/webupd8team/java/ubuntu xenial InRelease
Err:27 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial Release
403 Forbidden [IP: 91.189.95.83 80]
Reading package lists... Done
W: Target Sources (main/source/Sources) is configured multiple times in /etc/apt/sources.list.d/webupd8team-ubuntu-java-xenial.list:2 and /etc/apt/sources.list.d/webupd8team-ubuntu-java-xenial.list:3
W: GPG error: https://dl.winehq.org/wine-builds/ubuntu xenial InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 76F1A20FF987672F
E: The repository 'https://dl.winehq.org/wine-builds/ubuntu xenial 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://download.opensuse.org/repositories/Emulators:/Wine:/Debian/xUbuntu_16.04 ./ InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY DFA175A75104960E
E: The repository 'http://download.opensuse.org/repositories/Emulators:/Wine:/Debian/xUbuntu_16.04 ./ 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 'http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial 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.
W: Target Sources (main/source/Sources) is configured multiple times in /etc/apt/sources.list.d/webupd8team-ubuntu-java-xenial.list:2 and /etc/apt/sources.list.d/webupd8team-ubuntu-java-xenial.list:3
Then I use this command Sudo apt upgrade The result was this
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following package was automatically installed and is no longer required:
libjson-c2:i386
Use 'sudo apt autoremove' to remove it.
The following NEW packages will be installed:
libvulkan1
The following packages will be upgraded:
base-files bsdutils distro-info-data dmidecode gnome-software gnome-software-common google-chrome-stable grub-common grub-efi-amd64 grub-efi-amd64-bin grub-efi-amd64-signed
grub2-common initramfs-tools initramfs-tools-bin initramfs-tools-core libblkid1 libfdisk1 libmount1 libprocps4 libpulse-mainloop-glib0 libpulse0 libpulse0:i386 libpulsedsp
libpython3.6-minimal libpython3.6-stdlib libsmartcols1 libsnapd-glib1 libuuid1 mount procps pulseaudio pulseaudio-module-bluetooth pulseaudio-module-x11 pulseaudio-utils
python3-distupgrade python3-gdbm python3.6 python3.6-minimal skypeforlinux snapd snapd-xdg-open ubuntu-core-launcher ubuntu-release-upgrader-core ubuntu-release-upgrader-gtk
ubuntu-software unattended-upgrades util-linux uuid-runtime
48 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 4,499 kB/175 MB of archives.
After this operation, 30.8 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
WARNING: The following packages cannot be authenticated!
python3.6 libpython3.6-stdlib python3.6-minimal libpython3.6-minimal python3-gdbm
Authentication warning overridden.
Err:1 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main amd64 python3.6 amd64 3.6.8-1~16.04.york3
403 Forbidden [IP: 91.189.95.83 80]
Err:2 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main amd64 libpython3.6-stdlib amd64 3.6.8-1~16.04.york3
403 Forbidden [IP: 91.189.95.83 80]
Err:3 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main amd64 python3.6-minimal amd64 3.6.8-1~16.04.york3
403 Forbidden [IP: 91.189.95.83 80]
Err:4 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main amd64 libpython3.6-minimal amd64 3.6.8-1~16.04.york3
403 Forbidden [IP: 91.189.95.83 80]
Err:5 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main amd64 python3-gdbm amd64 3.6.5-3~16.04.york4
403 Forbidden [IP: 91.189.95.83 80]
E: Failed to fetch http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu/pool/main/p/python3.6/python3.6_3.6.8-1~16.04.york3_amd64.deb 403 Forbidden [IP: 91.189.95.83 80]
E: Failed to fetch http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu/pool/main/p/python3.6/libpython3.6-stdlib_3.6.8-1~16.04.york3_amd64.deb 403 Forbidden [IP: 91.189.95.83 80]
E: Failed to fetch http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu/pool/main/p/python3.6/python3.6-minimal_3.6.8-1~16.04.york3_amd64.deb 403 Forbidden [IP: 91.189.95.83 80]
E: Failed to fetch http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu/pool/main/p/python3.6/libpython3.6-minimal_3.6.8-1~16.04.york3_amd64.deb 403 Forbidden [IP: 91.189.95.83 80]
E: Failed to fetch http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu/pool/main/p/python3-stdlib-extensions/python3-gdbm_3.6.5-3~16.04.york4_amd64.deb 403 Forbidden [IP: 91.189.95.83 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
Then I use this command ** Sudo apt dist-upgrade** The result was
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following package was automatically installed and is no longer required:
libjson-c2:i386
Use 'sudo apt autoremove' to remove it.
The following NEW packages will be installed:
libvulkan1
The following packages will be upgraded:
base-files bsdutils distro-info-data dmidecode gnome-software gnome-software-common google-chrome-stable grub-common grub-efi-amd64 grub-efi-amd64-bin grub-efi-amd64-signed
grub2-common initramfs-tools initramfs-tools-bin initramfs-tools-core libblkid1 libfdisk1 libmount1 libprocps4 libpulse-mainloop-glib0 libpulse0 libpulse0:i386 libpulsedsp
libpython3.6-minimal libpython3.6-stdlib libsmartcols1 libsnapd-glib1 libuuid1 mount procps pulseaudio pulseaudio-module-bluetooth pulseaudio-module-x11 pulseaudio-utils
python3-distupgrade python3-gdbm python3.6 python3.6-minimal skypeforlinux snapd snapd-xdg-open ubuntu-core-launcher ubuntu-release-upgrader-core ubuntu-release-upgrader-gtk
ubuntu-software unattended-upgrades util-linux uuid-runtime
48 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 4,499 kB/175 MB of archives.
After this operation, 30.8 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
WARNING: The following packages cannot be authenticated!
python3.6 libpython3.6-stdlib python3.6-minimal libpython3.6-minimal python3-gdbm
Authentication warning overridden.
Err:1 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main amd64 python3.6 amd64 3.6.8-1~16.04.york3
403 Forbidden [IP: 91.189.95.83 80]
Err:2 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main amd64 libpython3.6-stdlib amd64 3.6.8-1~16.04.york3
403 Forbidden [IP: 91.189.95.83 80]
Err:3 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main amd64 python3.6-minimal amd64 3.6.8-1~16.04.york3
403 Forbidden [IP: 91.189.95.83 80]
Err:4 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main amd64 libpython3.6-minimal amd64 3.6.8-1~16.04.york3
403 Forbidden [IP: 91.189.95.83 80]
Err:5 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main amd64 python3-gdbm amd64 3.6.5-3~16.04.york4
403 Forbidden [IP: 91.189.95.83 80]
E: Failed to fetch http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu/pool/main/p/python3.6/python3.6_3.6.8-1~16.04.york3_amd64.deb 403 Forbidden [IP: 91.189.95.83 80]
E: Failed to fetch http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu/pool/main/p/python3.6/libpython3.6-stdlib_3.6.8-1~16.04.york3_amd64.deb 403 Forbidden [IP: 91.189.95.83 80]
E: Failed to fetch http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu/pool/main/p/python3.6/python3.6-minimal_3.6.8-1~16.04.york3_amd64.deb 403 Forbidden [IP: 91.189.95.83 80]
E: Failed to fetch http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu/pool/main/p/python3.6/libpython3.6-minimal_3.6.8-1~16.04.york3_amd64.deb 403 Forbidden [IP: 91.189.95.83 80]
E: Failed to fetch http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu/pool/main/p/python3-stdlib-extensions/python3-gdbm_3.6.5-3~16.04.york4_amd64.deb 403 Forbidden [IP: 91.189.95.83 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
then I run this command Sudo apt-get autoremove the result is
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 48 not upgraded.
Then I run this command Sudo apt install update-manager-core the result was
Reading package lists... Done
Building dependency tree
Reading state information... Done
update-manager-core is already the newest version (1:16.04.17).
0 upgraded, 0 newly installed, 0 to remove and 48 not upgraded.
then I run the command sudo do-release-upgrade The result was
Checking for a new Ubuntu release
Please install all available updates for your release before upgrading.
Please suggest what I am doing wrong and what sort of upgrade is missed from my side
