[Bug 1685383] Re: package nfs-kernel-server 1:1.2.8-9ubuntu12.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[L. P. Luigi Espenlaub]

Apparently the 5.1 version of virtualbox was the problem and needed to
be removed and replaced by 5.2.

I had to learn how to properly remove it and then properly install the
5.2. deb.

ran update again and did not receive a repeat of the error.

If anyone else who got this error had virtualbox <=5.1 go to the Oracle
site

https://www.virtualbox.org/wiki/Linux_Downloads

and download the 
Ubuntu 16.04 ("Xenial")  i386 |  AMD64
package for 5.2

It will not install cleanly over earlier versions, remove them as
follows.

do not use: 
sudo apt-get remove virtualbox
It will tell you it it does not exist or is not installed.
or
sudo apt-get remove virtualbox-\* [Really Dangerous! but if you do not know the title of the original deb this might suggest it as it did for me.  Enter "n" at the y/n prompt to avoid removing a lot of files that will have to be re-installed]

** use entire deb title
sudo apt-get remove virtualbox-5.x_5.x.0~Ubuntu~xenial_i386 [This is an example only and not accurate]

then open the deb file with the Ubuntu Software Center [the software
installer stalled out on my machine] and if no error message is shown
click [install]

at this point I was able to run apt-get commands and Update and received
no errors.

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https://bugs.launchpad.net/bugs/1685383

Title:
  package nfs-kernel-server 1:1.2.8-9ubuntu12.1 failed to
  install/upgrade: subprocess installed post-installation script
  returned error exit status 1

Status in nfs-utils package in Ubuntu:
  Confirmed

Bug description:
  virtualbox crashed

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: nfs-kernel-server 1:1.2.8-9ubuntu12.1
  ProcVersionSignature: Ubuntu 4.4.0-72.93-generic 4.4.49
  Uname: Linux 4.4.0-72-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.5
  Architecture: amd64
  Date: Sat Apr 22 00:59:40 2017
  ErrorMessage: subprocess installed post-installation script returned error exit status 1
  InstallationDate: Installed on 2015-12-09 (499 days ago)
  InstallationMedia: Ubuntu-MATE 15.10 "Wily Werewolf" - Release amd64 (20151021)
  RelatedPackageVersions:
   dpkg 1.18.4ubuntu1.1
   apt  1.2.19
  SourcePackage: nfs-utils
  Title: package nfs-kernel-server 1:1.2.8-9ubuntu12.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
  UpgradeStatus: Upgraded to xenial on 2016-05-18 (338 days ago)

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