[Bug 1146170] [NEW] duplicate "N packages can be updated." messages in motd

[Marius Gedminas]

Public bug reported:

Lately I've been noticing that as I ssh into one particular server, I
get duplicate messages about updates.  Digging a bit deeper I see they
come from /usr/lib/update-notifier/update-motd-updates-available:

    mg at fridge: ~ $ /usr/lib/update-notifier/update-motd-updates-
available

    0 packages can be updated.
    0 updates are security updates.

    0 packages can be updated.
    0 updates are security updates.

    0 packages can be updated.
    0 updates are security updates.

Once I saw three messages with slightly different spacing (no blank line
between 1st and 2nd, two blank lines between 2nd and 3rd).  Yesterday I
also saw a similar issue (two messages instead of one) on a different
server (running Ubuntu 10.04).

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: update-notifier-common 0.119ubuntu8.6
ProcVersionSignature: Ubuntu 3.2.0-35.55-generic 3.2.34
Uname: Linux 3.2.0-35-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.1
Architecture: amd64
Date: Tue Mar  5 08:31:28 2013
MarkForUpload: True
PackageArchitecture: all
SourcePackage: update-notifier
UpgradeStatus: Upgraded to precise on 2012-07-31 (216 days ago)

** Affects: update-notifier (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug precise

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https://bugs.launchpad.net/bugs/1146170

Title:
  duplicate "N packages can be updated." messages in motd

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

Bug description:
  Lately I've been noticing that as I ssh into one particular server, I
  get duplicate messages about updates.  Digging a bit deeper I see they
  come from /usr/lib/update-notifier/update-motd-updates-available:

      mg at fridge: ~ $ /usr/lib/update-notifier/update-motd-updates-
  available

      0 packages can be updated.
      0 updates are security updates.

      0 packages can be updated.
      0 updates are security updates.

      0 packages can be updated.
      0 updates are security updates.

  Once I saw three messages with slightly different spacing (no blank
  line between 1st and 2nd, two blank lines between 2nd and 3rd).
  Yesterday I also saw a similar issue (two messages instead of one) on
  a different server (running Ubuntu 10.04).

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: update-notifier-common 0.119ubuntu8.6
  ProcVersionSignature: Ubuntu 3.2.0-35.55-generic 3.2.34
  Uname: Linux 3.2.0-35-generic x86_64
  ApportVersion: 2.0.1-0ubuntu17.1
  Architecture: amd64
  Date: Tue Mar  5 08:31:28 2013
  MarkForUpload: True
  PackageArchitecture: all
  SourcePackage: update-notifier
  UpgradeStatus: Upgraded to precise on 2012-07-31 (216 days ago)

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