Public bug reported:
It said that failure to upgrade maybe a result of unofficial ppa
sources, but I did ppa-purge to remove all possible ppa. Still don't
work.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-release-upgrader-core 1:16.04.26
ProcVersionSignature: Ubuntu 4.15.0-60.67~16.04.1-generic 4.15.18
Uname: Linux 4.15.0-60-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.19
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Thu Sep 5 00:23:14 2019
InstallationDate: Installed on 2017-09-26 (708 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64
(20170215.2)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to xenial on 2019-09-04 (0 days ago)
VarLogDistupgradeTermlog:
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade third-party-packages xenial
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https://bugs.launchpad.net/bugs/1842762
Title:
cannot upgrade from 16.04 to 18.04
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