package telnetd (not installed) failed to install/upgrade: sub-processo script post-removal instalado retornou estado de saída de erro 8

[Giovanni Nunes]

I think that DPKG can't uninstall this package because it didn't properly remove 'telnet' usar and/or kill all running telnetd processes.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: telnetd (not installed)
ProcVersionSignature: Ubuntu 4.4.0-51.72-generic 4.4.30
Uname: Linux 4.4.0-51-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
AptOrdering:
 telnetd: Purge
 NULL: ConfigurePending
Architecture: amd64
Date: Wed Nov 30 20:59:41 2016
DpkgTerminalLog:
 A remover telnetd (0.17-40) ...
 userdel: user telnetd is currently used by process 8317
 dpkg: erro ao processar o pacote telnetd (--purge):
  sub-processo script post-removal instalado retornou estado de saída de erro 8
ErrorMessage: sub-processo script post-removal instalado retornou estado de saída de erro 8
InstallationDate: Installed on 2016-10-01 (60 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.15
SourcePackage: netkit-telnet
Title: package telnetd (not installed) failed to install/upgrade: sub-processo script post-removal instalado retornou estado de saída de erro 8
UpgradeStatus: No upgrade log present (probably fresh install)