Public bug reported:
When I tried to upgrade from Ubuntu 20.04 LTS to 20.10 using Ubuntu
update-manager an error happens:
"Invalid package information
After updating your package information, the essential package 'ubuntu-minimal'
could not be located. This may be because you have no official mirrors listed
in your software sources, or because of excessive load on the mirror you are
using. See /etc/apt/sources.list for the current list of configured software
sources.
In the case of an overloaded mirror, you may want to try the upgrade again
later."
More information:
$ lsb_release -rd
Description: Ubuntu 20.04.1 LTS
Release: 20.04
$ apt-cache policy update-manager
update-manager:
Installed: 1:20.04.10.1
Candidate: 1:20.04.10.1
Version table:
*** 1:20.04.10.1 500
500 mirror://mirrors.ubuntu.com/mirrors.txt focal-updates/main amd64
Packages
500 mirror://mirrors.ubuntu.com/mirrors.txt focal-updates/main i386
Packages
100 /var/lib/dpkg/status
1:20.04.9 500
500 mirror://mirrors.ubuntu.com/mirrors.txt focal/main amd64 Packages
500 mirror://mirrors.ubuntu.com/mirrors.txt focal/main i386 Packages
$ apt-cache policy apt
apt:
Installed: 2.0.2ubuntu0.1
Candidate: 2.0.2ubuntu0.1
Version table:
*** 2.0.2ubuntu0.1 500
500 mirror://mirrors.ubuntu.com/mirrors.txt focal-updates/main amd64
Packages
500 mirror://mirrors.ubuntu.com/mirrors.txt focal-security/main amd64
Packages
100 /var/lib/dpkg/status
2.0.2 500
500 mirror://mirrors.ubuntu.com/mirrors.txt focal/main amd64 Packages
$ apt-cache policy dpkg
dpkg:
Installed: 1.19.7ubuntu3
Candidate: 1.19.7ubuntu3
Version table:
*** 1.19.7ubuntu3 500
500 mirror://mirrors.ubuntu.com/mirrors.txt focal/main amd64 Packages
100 /var/lib/dpkg/status
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubuntu-release-upgrader-core 1:20.04.28
ProcVersionSignature: Ubuntu 5.4.0-52.57-generic 5.4.65
Uname: Linux 5.4.0-52-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.11
Architecture: amd64
CasperMD5CheckResult: skip
CrashDB: ubuntu
Date: Sat Nov 7 09:08:59 2020
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to focal on 2020-11-07 (0 days ago)
VarLogDistupgradeAptlog:
Log time: 2020-11-07 09:08:18.698906
Log time: 2020-11-07 09:08:25.854096
Log time: 2020-11-07 09:08:56.423365
Log time: 2020-11-07 09:09:00.628915
VarLogDistupgradeTermlog:
mtime.conffile..etc.update-manager.release-upgrades: 2020-11-07T09:03:09.002716
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade focal
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https://bugs.launchpad.net/bugs/1903387
Title:
Ubuntu failed to upgrade from Ubuntu 20.04 LTS to 20.10
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