[Bug 1488545] Re: Software update upgrade to higher ubunto invalade package infomation

[Marcus]

What do i do.

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https://bugs.launchpad.net/bugs/1488545

Title:
  Software update upgrade to higher ubunto invalade package infomation

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

Bug description:
  No valid mirror found

  While scanning your repository information no mirror entry for the
  upgrade was found. This can happen if you run an internal mirror or if
  the mirror information is out of date.

  Do you want to rewrite your 'sources.list' file anyway? If you choose 'Yes' here it will update all 'saucy' to 'trusty' entries.
  If you select 'No' the upgrade will cancel. 

  Click "YES" Then

  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.

  ProblemType: Bug
  DistroRelease: Zorin OS 8
  Package: ubuntu-release-upgrader-core 1:0.205.4 [origin: unknown]
  ProcVersionSignature: Ubuntu 3.11.0-17.31-generic 3.11.10.3
  Uname: Linux 3.11.0-17-generic i686
  ApportVersion: 2.12.5-0ubuntu2.2
  Architecture: i386
  CrashDB: ubuntu
  Date: Tue Aug 25 16:01:53 2015
  InstallationDate: Installed on 2015-08-25 (0 days ago)
  InstallationMedia: Zorin 8 - Release i386
  MarkForUpload: True
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=en_US
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to saucy on 2015-08-25 (0 days ago)
  VarLogDistupgradeAptlog:
   Log time: 2015-08-25 16:00:46.169237
   Log time: 2015-08-25 16:00:47.200460
   Log time: 2015-08-25 16:01:33.453425
   Log time: 2015-08-25 16:01:53.600601
  VarLogDistupgradeTermlog:

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