[Bug 1798884] Re: Upgrade or install fails 1:7.2p2-4ubuntu2.5

[Andreas Hasenack]

It's not entirely clear how you got yourself into that situation, so we
can leave this bug marked as "incomplete" so that it will auto expire if
there is no new information in a few weeks.

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Title:
  Upgrade or install fails 1:7.2p2-4ubuntu2.5

Status in openssh package in Ubuntu:
  Incomplete

Bug description:
  Today I've got an update to openssh-server version 1:7.2p2-4ubuntu2.5
  but installation fails. Also when I purge the package and install it
  again, I get the same error message:

  openssh-server (1:7.2p2-4ubuntu2.5) wird eingerichtet ...
  insserv: warning: script 'screen-cleanup' missing LSB tags and overrides
  insserv: Default-Start undefined, assuming empty start runlevel(s) for script `screen-cleanup'
  insserv: Default-Stop  undefined, assuming empty stop  runlevel(s) for script `screen-cleanup'
  Job for ssh.service failed because the control process exited with error code. See "systemctl status ssh.service" and "journalctl -xe" for details.
  invoke-rc.d: initscript ssh, action "start" failed.
  ● ssh.service - OpenBSD Secure Shell server
     Loaded: loaded (/lib/systemd/system/ssh.service; enabled; vendor preset: enabled)
     Active: failed (Result: exit-code) since Fr 2018-10-19 20:53:49 CEST; 12ms ago
    Process: 29682 ExecStart=/usr/sbin/sshd -D $SSHD_OPTS (code=exited, status=255)
    Process: 29678 ExecStartPre=/usr/sbin/sshd -t (code=exited, status=0/SUCCESS)
   Main PID: 29682 (code=exited, status=255)

  Okt 19 20:53:48 zulu1451.server4you.de systemd[1]: Starting OpenBSD Secure Shell server...
  Okt 19 20:53:49 zulu1451.server4you.de systemd[1]: ssh.service: Main process exited, code=code=exited, status=255/n/a
  Okt 19 20:53:49 zulu1451.server4you.de systemd[1]: Failed to start OpenBSD Secure Shell server.
  Okt 19 20:53:49 zulu1451.server4you.de systemd[1]: ssh.service: Unit entered failed state.
  Okt 19 20:53:49 zulu1451.server4you.de systemd[1]: ssh.service: Failed with result 'exit-code'.
  Hint: Some lines were ellipsized, use -l to show in full.
  dpkg: Fehler beim Bearbeiten des Paketes openssh-server (--configure):
   Unterprozess installiertes post-installation-Skript gab den Fehlerwert 1 zurück
  dpkg: Abhängigkeitsprobleme verhindern Konfiguration von ssh:
   ssh hängt ab von openssh-server (>= 1:7.2p2-4ubuntu2.5); aber:
    Paket openssh-server ist noch nicht konfiguriert.

  dpkg: Fehler beim Bearbeiten des Paketes ssh (--configure):
   Abhängigkeitsprobleme - verbleibt unkonfiguriert
  Fehler traten auf beim Bearbeiten von:
   openssh-server
   ssh

  
  The system is:
  Description:    Ubuntu 16.04.5 LTS
  Release:        16.04

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