package samba 2:4.4.5+dfsg-2ubuntu5.6 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Karl Schindler]

Job for smbd.service failed because the control process exited with error code.
See "systemctl status smbd.service" and "journalctl -xe" for details.

ProblemType: Package
DistroRelease: Ubuntu 16.10
Package: samba 2:4.4.5+dfsg-2ubuntu5.6
ProcVersionSignature: Ubuntu 4.8.0-52.55-generic 4.8.17
Uname: Linux 4.8.0-52-generic x86_64
ApportVersion: 2.20.3-0ubuntu8.2
Architecture: amd64
BothFailedConnect: Yes
Date: Fri May 26 06:31:42 2017
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2017-04-17 (38 days ago)
InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
NmbdLog:

RelatedPackageVersions:
 dpkg 1.18.10ubuntu1.1
 apt 1.3.5
SambaServerRegression: Yes
SmbConfIncluded: Yes
SmbLog:

SourcePackage: samba
Title: package samba 2:4.4.5+dfsg-2ubuntu5.6 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Andreas Hasenack (ahasenack)]

You have an odd looking share definition at the end of your smb.conf:

[<folder_name>]
path = /home/kschindl/samba/
valid users = kschindl
read only = no

I think "<folder name>" was meant to be replaced by something else.

In addition do that, testparm is complaining about your "map to guest" choice:
WARNING: Ignoring invalid value 'bad password;' for parameter 'map to guest'

That is actually preventing the service from starting. Removing the ";" at the end of the line fixes that.