[Bug 1928718] Re: unable to upgrade from 18.4 to 20.4

[william welch]

serrano$ sudo do-release-upgrade -p
Checking for a new Ubuntu release
Get:1 Upgrade tool signature [1,554 B]                                         
Get:2 Upgrade tool [1,349 kB]                                                  
Fetched 1,350 kB in 0s (0 B/s)                                                 
authenticate 'focal.tar.gz' against 'focal.tar.gz.gpg' 
Authentication failed
Authenticating the upgrade failed. There may be a problem with the network or with the server. 
serrano$ 

I dont know how to fix this.

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https://bugs.launchpad.net/bugs/1928718

Title:
  unable to upgrade from 18.4 to 20.4

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

Bug description:
  i tried remove microsoft and oracle programs. still no luck upgrading

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.44
  ProcVersionSignature: Ubuntu 5.4.0-73.82~18.04.1-generic 5.4.106
  Uname: Linux 5.4.0-73-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu7.23
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Mon May 17 14:27:13 2021
  InstallationDate: Installed on 2020-01-11 (492 days ago)
  InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2021-05-17 (0 days ago)
  VarLogDistupgradeTermlog:

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