ubuntu-minimal missing due to failure to communicate with an ubuntu mirror

[Bennet Otoho]

Update Manager could not upgrade my OS to Bionic Beaver (18.04) from Xenial Xerus (16.04). It ran into an error stating that the 'ubuntu-minimal' package could not be found. However, the device had just been updated and that exact package (ubuntu-minimal) was one of those that were downloaded and installed during the update.

Description: Ubuntu 16.04.6 LTS
Release: 16.04

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-release-upgrader-core 1:16.04.30
ProcVersionSignature: Ubuntu 4.4.0-184.214-generic 4.4.223
Uname: Linux 4.4.0-184-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.23
Architecture: amd64
CrashDB: ubuntu
Date: Thu Jun 18 03:42:39 2020
InstallationDate: Installed on 2018-10-26 (600 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_NG:en
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_NG
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to xenial on 2020-06-18 (0 days ago)
VarLogDistupgradeAptlog:
 Log time: 2020-06-18 03:34:57.343145
 Log time: 2020-06-18 03:35:10.979997
 Log time: 2020-06-18 03:41:59.469168
 Log time: 2020-06-18 03:42:46.367436
VarLogDistupgradeTermlog:

[Brian Murray (brian-murray)]

There was an issue communicating with the mirror of Ubuntu which you use. This is an error you'll need to sort out yourself.

2020-06-18 03:35:42,078 DEBUG examining: 'deb http://ng.archive.ubuntu.com/ubuntu/ xenial main restricted'
2020-06-18 03:35:42,078 DEBUG verifySourcesListEntry: deb http://ng.archive.ubuntu.com/ubuntu/ bionic main restricted
2020-06-18 03:35:42,078 DEBUG url_downloadable: http://ng.archive.ubuntu.com/ubuntu//dists/bionic/Release
2020-06-18 03:35:42,078 DEBUG s='http' n='ng.archive.ubuntu.com' p='/ubuntu//dists/bionic/Release' q='' f=''
2020-06-18 03:36:02,111 DEBUG error from httplib: '<urlopen error [Errno -3] Temporary failure in name resolution>'

[Launchpad Janitor (janitor)]

[Expired for ubuntu-release-upgrader (Ubuntu) because there has been no activity for 60 days.]