[Bug 2011844] Re: I cant upgrade my ubuntu version and other programs. Errors show server mirrors' problems.

[Nick Rosbrook]

You should not have the cdrom source enabled, and it sounds like your
octave PPA does not have information for the release either. Please drop
those sources and then try again. If you continue to have issues, please
open a new bug report with the latest logs.

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https://bugs.launchpad.net/bugs/2011844

Title:
  I cant upgrade my ubuntu version and other programs. Errors show
  server mirrors' problems.

Status in ubuntu-release-upgrader package in Ubuntu:
  Invalid

Bug description:
  I tried solutions found at digital ocean and ask ubuntu, but none of
  them helped.

  https://www.digitalocean.com/community/questions/cannot-update-
  to-19-04-the-essential-package-ubuntu-minimal-could-not-be-
  located-2?answer=51260

  https://askubuntu.com/questions/1231817/invalid-package-information-
  error-when-upgrading-to-ubuntu-20-04

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubuntu-release-upgrader-core 1:20.04.32
  ProcVersionSignature: Ubuntu 5.4.0-73.82-generic 5.4.106
  Uname: Linux 5.4.0-73-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.17
  Architecture: amd64
  CasperMD5CheckResult: skip
  CrashDB: ubuntu
  Date: Thu Mar 16 17:56:43 2023
  InstallationDate: Installed on 2021-04-09 (706 days ago)
  InstallationMedia: Ubuntu 18.04.5 LTS "Bionic Beaver" - Release amd64 (20200806.1)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to focal on 2023-03-16 (0 days ago)
  VarLogDistupgradeAptlog:
   Log time: 2023-03-16 17:56:10.011036
   Log time: 2023-03-16 17:56:14.662660
   Log time: 2023-03-16 17:56:43.382580
   Log time: 2023-03-16 17:56:45.608317

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