[Bug 1933318] Re: package proftpd-core 1.3.7a+dfsg-12 failed to install/upgrade: installed proftpd-core package post-installation script subprocess returned error exit status 1

[Karl Schindler]

it was always the proftpd-core config problem
the following solved it for me:

sudo apt remove proftpd*
sudp apt purge proftpd*
sudo apt-get install proftpd*

sudo service proftpd start

proftpd.service - ProFTPD FTP Server
     Loaded: loaded (/lib/systemd/system/proftpd.service; enabled; vendor preset: enabled)
     Active: active (running) since Mon 2021-07-19 12:53:36 +07; 9min ago
   Main PID: 12406 (proftpd)
      Tasks: 1 (limit: 4632)
     Memory: 4.1M

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https://bugs.launchpad.net/bugs/1933318

Title:
  package proftpd-core 1.3.7a+dfsg-12 failed to install/upgrade:
  installed proftpd-core package post-installation script subprocess
  returned error exit status 1

Status in proftpd-dfsg package in Ubuntu:
  Confirmed

Bug description:
  upgrade 20.10 to 21.04

  ProblemType: Package
  DistroRelease: Ubuntu 21.04
  Package: proftpd-core 1.3.7a+dfsg-12
  ProcVersionSignature: Ubuntu 5.11.0-22.23-generic 5.11.21
  Uname: Linux 5.11.0-22-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu65.1
  Architecture: amd64
  CasperMD5CheckResult: unknown
  Date: Wed Jun 23 11:04:27 2021
  ErrorMessage: installed proftpd-core package post-installation script subprocess returned error exit status 1
  InstallationDate: Installed on 2020-05-29 (390 days ago)
  InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
  Python3Details: /usr/bin/python3.9, Python 3.9.5, python3-minimal, 3.9.4-1
  PythonDetails: /usr/bin/python3.9, Python 3.9.5, unpackaged
  RelatedPackageVersions:
   dpkg 1.20.9ubuntu1
   apt  2.2.3
  SourcePackage: proftpd-dfsg
  Title: package proftpd-core 1.3.7a+dfsg-12 failed to install/upgrade: installed proftpd-core package post-installation script subprocess returned error exit status 1
  UpgradeStatus: Upgraded to hirsute on 2021-06-23 (0 days ago)

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