[Bug 1876189] Re: package sysfsutils 2.1.0+repack-6 failed to install/upgrade: conffile difference visualizer subprocess returned error exit status 127

[Sebastien Bacher]

'Configuration file '/etc/sysfs.conf'
 ==> Modified (by you or by a script) since installation.
 ==> Package distributor has shipped an updated version.
   What would you like to do about it ?  Your options are:
    Y or I  : install the package maintainer's version
    N or O  : keep your currently-installed version
      D     : show the differences between the versions
      Z     : start a shell to examine the situation
 The default action is to keep your current version.
*** sysfs.conf (Y/I/N/O/D/Z) [default=N] ? d D
sh: 1: pager: not found
diff: standard output: Broken pipe'

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https://bugs.launchpad.net/bugs/1876189

Title:
  package sysfsutils 2.1.0+repack-6 failed to install/upgrade: conffile
  difference visualizer subprocess returned error exit status 127

Status in debconf package in Ubuntu:
  New

Bug description:
  I think this was due to forcing an update to 20.04 lts from 18.04 lts.

  ProblemType: Package
  DistroRelease: Ubuntu 20.04
  Package: sysfsutils 2.1.0+repack-6
  ProcVersionSignature: Ubuntu 5.4.0-28.32-generic 5.4.30
  Uname: Linux 5.4.0-28-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27
  Architecture: amd64
  CasperMD5CheckResult: skip
  Date: Wed Apr 29 16:18:06 2020
  ErrorMessage: conffile difference visualizer subprocess returned error exit status 127
  InstallationDate: Installed on 2020-04-15 (15 days ago)
  InstallationMedia: Ubuntu 18.04.4 LTS "Bionic Beaver" - Release amd64 (20200203.1)
  Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu2
  PythonDetails: /usr/bin/python2.7, Python 2.7.18rc1, python-is-python2, 2.7.17-4
  RelatedPackageVersions:
   dpkg 1.19.7ubuntu3
   apt  2.0.2
  SourcePackage: sysfsutils
  Title: package sysfsutils 2.1.0+repack-6 failed to install/upgrade: conffile difference visualizer subprocess returned error exit status 127
  UpgradeStatus: Upgraded to focal on 2020-04-30 (0 days ago)
  modified.conffile..etc.sysfs.conf: [modified]
  mtime.conffile..etc.sysfs.conf: 2020-04-17T18:17:04.410519

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