[Bug 1787486] Re: Failure upgrading to 18.04 from 16.04.

[Brian Murray]

You seem to not have the fairly import package ubuntu-minimal installed.
Please install it and attempt the upgrade again.  Thanks!

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1787486

Title:
  Failure upgrading to 18.04 from 16.04.

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

Bug description:
  It fails with possible reasons being the following:
  * Upgrading to a pre-release version of Ubuntu
  * Running the current pre-release version of Ubuntu
  * Unnofficial software packages not provided by Ubuntu. 

  There are additional software packages not provided by ubuntu that are
  installed on the system, but they have not blocked updates in the
  past. Packages like Keepass, Dropbox, Crashplan,

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.25
  ProcVersionSignature: Ubuntu 4.4.0-133.159-generic 4.4.134
  Uname: Linux 4.4.0-133-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  CrashDB: ubuntu
  Date: Thu Aug 16 17:42:24 2018
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2015-04-24 (1210 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=en_US
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2018-08-16 (0 days ago)

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