crashes telling me that I have several repository mirrors

[Hardy Fajardo]

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.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-release-upgrader-core 1:16.04.25
ProcVersionSignature: Ubuntu 4.4.0-131.157-generic 4.4.134
Uname: Linux 4.4.0-131-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
CrashDB: ubuntu
Date: Sat Jul 28 07:02:04 2018
InstallationDate: Installed on 2016-02-25 (883 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
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 2018-07-28 (0 days ago)
VarLogDistupgradeAptlog:
 Log time: 2018-07-28 07:00:21.970308
 Log time: 2018-07-28 07:00:24.923305
 Log time: 2018-07-28 07:01:42.912790
 Log time: 2018-07-28 07:02:07.822974
VarLogDistupgradeTermlog:

mtime.conffile..etc.update-manager.release-upgrades: 2018-07-27T07:25:27.516261

[Brian Murray (brian-murray)]

The reason the ubuntu-minimal package is not found is because you have disabled the release pocket for main and restricted. Your /etc/apt/source.list file contains the following:

  5 # deb http://it-mirrors.evowise.com/ubuntu/ xenial main restricted
  6 # deb-src http://it-mirrors.evowise.com/ubuntu/ xenial main restricted

If you were to uncomment those lines ubuntu-minimal will be found but your upgrade may fail for other reasons.

[Launchpad Janitor (janitor)]

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