package kismet 2013.03.R1b-3build1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 6

[martin suchanek]

apt-cache policy kismet
kismet:
  Installed: 2013.03.R1b-3build1
  Candidate: 2013.03.R1b-3build1
  Version table:
 *** 2013.03.R1b-3build1 500
        500 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages
        100 /var/lib/dpkg/status

ubuntu : 1604

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: kismet 2013.03.R1b-3build1
ProcVersionSignature: Ubuntu 4.4.0-20.36-generic 4.4.6
Uname: Linux 4.4.0-20-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
Date: Sat Apr 16 16:39:36 2016
ErrorMessage: subprocess installed post-installation script returned error exit status 6
InstallationDate: Installed on 2014-10-21 (542 days ago)
InstallationMedia:

RelatedPackageVersions:
 dpkg 1.18.4ubuntu1
 apt 1.2.10ubuntu1
SourcePackage: kismet
Title: package kismet 2013.03.R1b-3build1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 6
UpgradeStatus: Upgraded to xenial on 2016-04-16 (0 days ago)

[Nick Andrik (andrikos)]

You can see the problem in the end of DpkgTerminalLog.gz :

usermod: user 'u2' does not exist
dpkg: error processing kismet (--configure):
 subprocess installed post-installation script returned error exit status 6

You need to specify the user in a "space-separated" list, not a comma separated one.
Could you please purge the package:
  sudo apt-get purge kismet

and then install it again?

For the time being I'm marking it as a duplicate, since this issue has been already reported and fixed in the newest version