[Bug 1894885] [NEW] error while upgrade ubuntu 18 LTS to 20 LTS: comm: /var/log/dmesg: No such file or directory

[TuD]

Public bug reported:

I want to upgrade my Ubuntu 18.04.5 LTS to 20.04.1 LTS, but got this:

Hit http://archive.canonical.com/ubuntu focal InRelease                                                                                                                                      
Fetched 0 B in 0s (0 B/s)                                                                                                                                                                    

Checking package manager
Reading package lists... Done    
Building dependency tree          
Reading state information... Done

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. 


Restoring original system state

Aborting
Reading package lists... Done    
Building dependency tree          
Reading state information... Done
name:~$ comm: /var/log/dmesg: No such file or directory

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.38
ProcVersionSignature: Ubuntu 5.4.0-47.51~18.04.1-generic 5.4.55
Uname: Linux 5.4.0-47-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.17
Architecture: amd64
CrashDB: ubuntu
Date: Tue Sep  8 20:07:46 2020
InstallationDate: Installed on 2019-12-21 (262 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2020-09-08 (0 days ago)
VarLogDistupgradeAptlog:
 Log time: 2020-09-08 20:07:25.300955
 Log time: 2020-09-08 20:07:30.323355
 Log time: 2020-09-08 20:07:45.988139
 Log time: 2020-09-08 20:07:50.051624

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic dist-upgrade

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https://bugs.launchpad.net/bugs/1894885

Title:
  error while upgrade ubuntu 18 LTS to 20 LTS: comm: /var/log/dmesg: No
  such file or directory

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

Bug description:
  I want to upgrade my Ubuntu 18.04.5 LTS to 20.04.1 LTS, but got this:

  Hit http://archive.canonical.com/ubuntu focal InRelease                                                                                                                                      
  Fetched 0 B in 0s (0 B/s)                                                                                                                                                                    

  Checking package manager
  Reading package lists... Done    
  Building dependency tree          
  Reading state information... Done

  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. 

  
  Restoring original system state

  Aborting
  Reading package lists... Done    
  Building dependency tree          
  Reading state information... Done
  name:~$ comm: /var/log/dmesg: No such file or directory

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.38
  ProcVersionSignature: Ubuntu 5.4.0-47.51~18.04.1-generic 5.4.55
  Uname: Linux 5.4.0-47-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.17
  Architecture: amd64
  CrashDB: ubuntu
  Date: Tue Sep  8 20:07:46 2020
  InstallationDate: Installed on 2019-12-21 (262 days ago)
  InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-09-08 (0 days ago)
  VarLogDistupgradeAptlog:
   Log time: 2020-09-08 20:07:25.300955
   Log time: 2020-09-08 20:07:30.323355
   Log time: 2020-09-08 20:07:45.988139
   Log time: 2020-09-08 20:07:50.051624

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