[Bug 1541800] Re: package libgksu2-0 2.0.13~pre1-6ubuntu7 failed to install/upgrade: subprocess installed post-removal script returned error exit status 127

[Seth Arnold]

This may take some work to untangle.

First, this looks highly unusual and may be some cause of problems:
udev             8191016   8191016         0 100% /dev

Second, python2.7 and python3 are not interchangeable. (The Python
developers would have done everyone a service if they had chosen to
rename the language instead of changing a version number. It's probably
too late now but I propose "Boa".) The programs that require python3
genuinely require python3, and the programs that require python2.7
genuinely require python2.7.

Use the AptOrdering.txt file here or your terminal scrollback to figure
out which packages to put back. It might take a lot of tries and re-
tries to get them all put back.

Good luck.

** Changed in: libgksu (Ubuntu)
       Status: New => Invalid

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Title:
  package libgksu2-0 2.0.13~pre1-6ubuntu7 failed to install/upgrade:
  subprocess installed post-removal script returned error exit status
  127

Status in libgksu package in Ubuntu:
  Invalid

Bug description:
  Was having problems with updates, upgrades and ap installs.  Tried the
  usual sudo apt-get autoremove, upgrade, update, clean etc, but never
  worked.  Always said issues were with Phython3.   So Google searches
  showed lots of similar problems, often resolved by revertibng to
  Python2.7...  but I was running 2.7, so I used synaptic to remove
  python3, then tried to clear broken packages which meant reinstalling
  lots of python3...

  problem still not gone away, and now this warning.

  ProblemType: Package
  DistroRelease: Ubuntu 15.10
  Package: libgksu2-0 2.0.13~pre1-6ubuntu7
  ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3
  Uname: Linux 4.2.0-18-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  Date: Thu Feb  4 10:22:35 2016
  DuplicateSignature: package:libgksu2-0:2.0.13~pre1-6ubuntu7:subprocess installed post-removal script returned error exit status 127
  ErrorMessage: subprocess installed post-removal script returned error exit status 127
  RelatedPackageVersions:
   dpkg 1.18.2ubuntu5.1
   apt  1.0.10.2ubuntu1
  SourcePackage: libgksu
  Title: package libgksu2-0 2.0.13~pre1-6ubuntu7 failed to install/upgrade: subprocess installed post-removal script returned error exit status 127
  UpgradeStatus: No upgrade log present (probably fresh install)

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