[Bug 1006103]

[Ubuntu Foundation's Bug Bot]

*** This bug is a duplicate of bug 346386 ***
    https://bugs.launchpad.net/bugs/346386

Thank you for taking the time to report this bug and helping to make
Ubuntu better.  Reviewing your bug report it seems that you are
experiencing bug 346386.  This issue happens when you have tried to
update your package information when you are a network that didn't
return the right files.  This issue can be cleaned up by using the
following commands in a terminal:

1.) sudo rm /var/lib/apt/lists/*
2.) sudo apt-get update

Thanks and good luck!

[This is an automated message.  I apologize if it reached you
inappropriately; please reopen the bug task if it was incorrect.]

** This bug has been marked a duplicate of bug 346386
   [MASTER] Update fails with invalid package files with "Encountered a section with no Package: header"

** Tags added: bot-comment

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https://bugs.launchpad.net/bugs/1006103

Title:
  update-manager crashes, apt-get, ubuntu-bug and software center do not
  work too

Status in “update-manager” package in Ubuntu:
  New

Bug description:
  For about a week the update manager crashes while initializing the
  package information.

  I'm a bit helpless because a bug report (using ubuntu bug) could not
  be generated and apt-get update does also not work. I will provide any
  information I have and will do furhter analysis if you give me
  instructions.

  The unity panel contains a notification icon stating that problems
  occured while running the update-manager. The user shall run the
  update-manager manually (1) or run apt-get in a terminal (2). As
  mentioned before there was a problem when running ubuntu-bug (3).

  = 1 run the update-manager manually =

  The application displays an error message and states a bug report should be placed and the following error message should be attached:
  ---
  E:Encountered a section with no Package: header, E:Problem with MergeList /var/lib/apt/lists/extras.ubuntu.com_ubuntu_dists_precise_main_binary-i386_Packages, E:Die Paketliste oder die Statusdatei konnte nicht eingelesen oder geöffnet werden (Translation: The package list or the status file could not be read or opened).
  ---

  = 2 Run apt-get in a terminal =

  Running apt-get in a terminal failed. There were several http 404 and
  some GPG errors. You will find the apt.out in the attachment. I
  attached /etc/apt/sources.list too.

  = 3 Problems while running ubuntu-bug (this seems to be already
  reported as Bug #996522) =

  While trying to generate a bug report using "ubuntu-bug update-manager" ubuntu-bug failed and the following error message was displayed:
  ---
  Ungültiger Problembericht  - Konnte Paket- oder Quellpaket-Namen nicht bestimmen.
  (Translation: Invalid issue report - couldn't determine package- or source-name)
  ---

  = Version Information =

  markus at markus-K52Jc:~$ lsb_release -rd
  Description:	Ubuntu 12.04 LTS
  Release:	12.04

  I was not able to determine the version of the update-manager used
  because "apt-cache policy update-manager" fails with the same error
  message as "apt-get upgrade" does (see attachment). I tried to use the
  Software Center without luck (It crashes just after start. The error
  report can not be generated. The error is the same displayed by
  ubuntu-bug.)

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