[Bug 884668] Re: sudo apt-get update fails to update extras repository because of unavailable public key

[Giorgos Akrivas]

Thanks for your reply.

I added the extras.ubuntu.com repository manually to the
/etc/apt/sources.list. This is an ubuntu server system, not an ubuntu-
desktop system. Following your question I tried to run synaptic, uncheck
the extras repository, run an update, then check it back and run an
update again. However, the error still occured. So, was I doing
something wrong, or is this a bug? if there is a bug, then perhaps there
is an error in the installer of the ubuntu server, not the desktop one,
which may explain how the bug remained unnoticed so far.

Your fix involving requesting the key from keyserver.ubuntu.com worked
and now I can run apt-get update with no error messages.

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https://bugs.launchpad.net/bugs/884668

Title:
  sudo apt-get update fails to update extras repository because of
  unavailable public key

Status in “apt” package in Ubuntu:
  Incomplete

Bug description:
  sudo apt-get update results into:

  
  W: GPG error: http://extras.ubuntu.com oneiric Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 16126D3A3E5C1192

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: apt 0.8.16~exp5ubuntu13
  ProcVersionSignature: Ubuntu 3.0.0-12.20-server 3.0.4
  Uname: Linux 3.0.0-12-server x86_64
  ApportVersion: 1.23-0ubuntu4
  Architecture: amd64
  Date: Tue Nov  1 11:48:11 2011
  InstallationMedia: Ubuntu-Server 11.10 "Oneiric Ocelot" - Release amd64 (20111011)
  SourcePackage: apt
  UpgradeStatus: No upgrade log present (probably fresh install)

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