[Bug 1904811] Re: package openssh-server 1:8.2p1-4ubuntu0.1 failed to install/upgrade: installed openssh-server package post-installation script subprocess returned error exit status 1

[Christian Ehrhardt ]

Hi,
from your log
SSHDConfig: Error: command ['/usr/sbin/sshd', '-T'] failed with exit code 255: /etc/ssh/sshd_config line 35: missing argument.

That means you (or a program) have modified /etc/ssh/sshd_config and due
to that the update (which needs to restart the server) fails. You can
restore the file to its default [1] or fixup that issue in the config
file manually. Then things should work again.

If you are convinced this indeed is a bug in the package we'd need to
see that config file what exactly is at that line 35.

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https://bugs.launchpad.net/bugs/1904811

Title:
  package openssh-server 1:8.2p1-4ubuntu0.1 failed to install/upgrade:
  installed openssh-server package post-installation script subprocess
  returned error exit status 1

Status in openssh package in Ubuntu:
  Incomplete

Bug description:
  ?

  ProblemType: Package
  DistroRelease: Ubuntu 20.04
  Package: openssh-server 1:8.2p1-4ubuntu0.1
  ProcVersionSignature: Ubuntu 5.4.0-54.60-generic 5.4.65
  Uname: Linux 5.4.0-54-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu27.12
  AptOrdering:
   openssh-sftp-server:amd64: Install
   openssh-server:amd64: Install
   ssh-import-id:amd64: Install
   NULL: ConfigurePending
  Architecture: amd64
  CasperMD5CheckResult: skip
  Date: Wed Nov 18 19:09:53 2020
  ErrorMessage: installed openssh-server package post-installation script subprocess returned error exit status 1
  InstallationDate: Installed on 2020-11-11 (7 days ago)
  InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
  Python3Details: /usr/bin/python3.8, Python 3.8.5, python3-minimal, 3.8.2-0ubuntu2
  PythonDetails: N/A
  RelatedPackageVersions:
   dpkg 1.19.7ubuntu3
   apt  2.0.2ubuntu0.1
  SSHDConfig: Error: command ['/usr/sbin/sshd', '-T'] failed with exit code 255: /etc/ssh/sshd_config line 35: missing argument.
  SourcePackage: openssh
  Title: package openssh-server 1:8.2p1-4ubuntu0.1 failed to install/upgrade: installed openssh-server package post-installation script subprocess returned error exit status 1
  UpgradeStatus: No upgrade log present (probably fresh install)

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