[Bug 1578832] Re: package openssh-server 1:7.2p2-4 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[ChristianEhrhardt]

Hi Marcus,
here from your log:
insserv: warning: script 'S20vpnserver' missing LSB tags and overrides
insserv: warning: script 'vpnserver' missing LSB tags and overrides
insserv: There is a loop at service plymouth if started
insserv: There is a loop between service plymouth and procps if started
insserv:  loop involving service procps at depth 2
insserv:  loop involving service udev at depth 1
insserv: There is a loop between service plymouth and urandom if started
insserv:  loop involving service urandom at depth 4
insserv:  loop involving service hwclock at depth 3
insserv: There is a loop between service vpnserver and udev if started
insserv:  loop involving service mountkernfs at depth 1
insserv: There is a loop at service vpnserver if started
insserv: Starting vpnserver depends on plymouth and therefore on system facility `$all' which can not be true!
...
insserv: Starting vpnserver depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Max recursions depth 99 reached
insserv:  loop involving service vpnserver at depth 1
insserv: There is a loop between service vpnserver and dns-clean if started
insserv:  loop involving service dns-clean at depth 1
insserv: exiting now without changing boot order!
update-rc.d: error: insserv rejected the script header

At least according to my checks /etc/init.d/vpnserver is not part of any package, but in this file is the dependency loop trigger.
You can check if it belongs to a package with:
$ dpkg -S /etc/init.d/vpnserve

You need to sort that config issue out or remove the file if it is a
remainder of some aborted experiments.

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https://bugs.launchpad.net/bugs/1578832

Title:
  package openssh-server 1:7.2p2-4 failed to install/upgrade: subprocess
  installed post-installation script returned error exit status 1

Status in openssh package in Ubuntu:
  Incomplete

Bug description:
  Tried to install ssh.

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: openssh-server 1:7.2p2-4
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  Date: Thu May  5 23:29:32 2016
  ErrorMessage: subprocess installed post-installation script returned error exit status 1
  InstallationDate: Installed on 2016-05-01 (4 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  RelatedPackageVersions:
   dpkg 1.18.4ubuntu1
   apt  1.2.10ubuntu1
  SourcePackage: openssh
  Title: package openssh-server 1:7.2p2-4 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
  UpgradeStatus: No upgrade log present (probably fresh install)

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