Unable to upgrade to 18.04

Hi Vineet,

You can try following steps and see if it works:

1) Open Software & Updates application. It should be the one with multiple tabs like Ubuntu Software, Other Software, Updates, Authentication, etc. "
2) In the tab "Ubuntu Software" there is an option "Download from", select "Main server" from the drop-down list.
3) Click on "Close" button and close the application.
4) Open "Software Updater " application or run sudo apt update

Hopefully, after step 4, you should not get the hash error. If you are not getting the error, then again you open Software & Updates application and from "Updates" tab, select "For Long-term support versions" from the "Notify me of a new Ubuntu version" option (the last option in this tab). Then again close the application and do step 4. This should show you a new button saying that the new version 18.04 is available.

Regards,
Abhishek

Hi Abhishek,

Thanks for the response, but that did not solve the problem.
Any other suggestions?

Regards,
Vineet

What output do you receive for the command

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 630239CC130E1A7FD81A27B140976EAF437D05B5

I get this:
Executing: /tmp/apt-key-gpghome.x7E9lK4GwZ/gpg.1.sh --keyserver keyserver.ubuntu.com --recv-keys 630239CC130E1A7FD81A27B140976EAF437D05B
gpg: "630239CC130E1A7FD81A27B140976EAF437D05B" not a key ID: skipping

Please provide the full output of the commands

uname -a
lsb_release -crid
sudo apt-get update

~$ uname -a
Linux Galaxy0726 4.13.0-40-generic #45-Ubuntu SMP Wed Apr 25 08:05:20 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
~$ lsb_release -crid
Distributor ID: Ubuntu
Description: Ubuntu 17.10
Release: 17.10
Codename: artful
~$ sudo apt-get update
Ign:1 http://dl.google.com/linux/chrome/deb stable InRelease
Hit:2 http://packages.microsoft.com/repos/vscode stable InRelease
Hit:3 http://storage.googleapis.com/bazel-apt stable InRelease
Hit:4 http://dl.google.com/linux/chrome/deb stable Release
Hit:5 http://ppa.launchpad.net/canonical-kernel-team/ppa/ubuntu artful InRelease
Hit:6 http://archive.ubuntu.com/ubuntu artful InRelease
Hit:7 http://security.ubuntu.com/ubuntu artful-security InRelease
Hit:9 https://repo.skype.com/deb stable InRelease
Hit:10 http://archive.ubuntu.com/ubuntu artful-updates InRelease
Hit:11 http://ppa.launchpad.net/peek-developers/stable/ubuntu artful InRelease
Hit:12 http://archive.ubuntu.com/ubuntu artful-backports InRelease
Hit:13 http://ppa.launchpad.net/webupd8team/java/ubuntu artful InRelease
Reading package lists... Done

Now the problem is gone somehow..I am not sure what really worked! But I still do not see the upgrade option!

Have you tried initiating the release-upgrade with the command

sudo do-release-upgrade

Yea, tried that as well.
sudo do-release-upgrade
Checking for a new Ubuntu release
No new release found.

Thanks,
Vineet

Perfectly worked.

Thanks a ton Manfred!

Thanks Manfred Hampl, that solved my question.

@kibet: Please do not piggyback on somebody else's question document that has already been marked as solved, but create a question document of your own.

Hi Everyone,
I am facing this problem for long period of time. I cant able to do sudo apt-get update. The signature is not valid.

Hit:1 http://ppa.launchpad.net/obsproject/obs-studio/ubuntu focal InRelease
Hit:2 http://archive.ubuntu.com/ubuntu focal InRelease
Ign:3 http://archive.canonical.com/ubuntu precise InRelease
Hit:4 http://downloads.metasploit.com/data/releases/metasploit-framework/apt lucid InRelease
Ign:5 http://extras.ubuntu.com/ubuntu precise InRelease
Hit:6 http://security.ubuntu.com/ubuntu focal-security InRelease
Ign:7 http://us.archive.ubuntu.com/ubuntu precise InRelease
Hit:8 http://archive.ubuntu.com/ubuntu focal-updates InRelease
Get:9 http://archive.canonical.com/ubuntu precise Release [8,180 B]
Get:10 http://extras.ubuntu.com/ubuntu precise Release [11.9 kB]
Hit:11 http://archive.ubuntu.com/ubuntu focal-backports InRelease
Get:12 http://extras.ubuntu.com/ubuntu precise Release.gpg [72 B]
Get:13 http://archive.canonical.com/ubuntu precise Release.gpg [181 B]
Ign:12 http://extras.ubuntu.com/ubuntu precise Release.gpg
Ign:13 http://archive.canonical.com/ubuntu precise Release.gpg
Get:14 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 were invalid: 630239CC130E1A7FD81A27B140976EAF437D05B5
Get:16 http://us.archive.ubuntu.com/ubuntu precise-updates InRelease [55.7 kB]
Err:16 http://us.archive.ubuntu.com/ubuntu precise-updates InRelease
  The following signatures were invalid: 630239CC130E1A7FD81A27B140976EAF437D05B5
Get:17 http://us.archive.ubuntu.com/ubuntu precise-backports InRelease [55.7 kB]
Err:17 http://us.archive.ubuntu.com/ubuntu precise-backports InRelease
  The following signatures were invalid: 630239CC130E1A7FD81A27B140976EAF437D05B5
Get:18 http://us.archive.ubuntu.com/ubuntu precise Release.gpg [198 B]
Ign:18 http://us.archive.ubuntu.com/ubuntu precise Release.gpg
Reading package lists... Done
W: GPG error: http://extras.ubuntu.com/ubuntu precise Release: Detached signature file '/var/lib/apt/lists/partial/extras.ubuntu.com_ubuntu_dists_precise_Release.gpg' is in unsupported binary format
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 were invalid: 630239CC130E1A7FD81A27B140976EAF437D05B5
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 were invalid: 630239CC130E1A7FD81A27B140976EAF437D05B5
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 were invalid: 630239CC130E1A7FD81A27B140976EAF437D05B5
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 were invalid: 630239CC130E1A7FD81A27B140976EAF437D05B5
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 were invalid: 630239CC130E1A7FD81A27B140976EAF437D05B5
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.

Kindly,Please help me in this case. Thank you in advance.

With Regards,
Praveen

@Praveen Kumar Selvam:

The same for you: Please do not piggyback on somebody else's question document that has already been marked as solved, but create a question document of your own.

I assume that you already did that, https://answers.launchpad.net/ubuntu/+question/691561