package samba 2:4.3.9+dfsg-0ubuntu0.16.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1. "I am unable to properly share, and samba config doesnt open. when it was running once i still could share properly."

[Josef Beuth]

first off, couldnt get the samba config to open, i followed an online guide to get it run, just by adding a blank file sudo pluma /etc/libuser.conf

now it opens, created some shares, couldnt access them, changed security from 'user' to 'share', now i could access some of the shares, but after a short while it stopped working completely. could reopen the program again. uninstalled program, installed again. failed to install. bug report

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: samba 2:4.3.9+dfsg-0ubuntu0.16.04.1
Uname: Linux 4.4.10-v7+ armv7l
ApportVersion: 2.20.1-0ubuntu2
AptOrdering:
 samba: Install
 samba: Configure
 NULL: ConfigurePending
Architecture: armhf
BothFailedConnect: Yes
Date: Mon May 16 13:37:28 2016
DuplicateSignature:
 Setting up samba (2:4.3.9+dfsg-0ubuntu0.16.04.1) ...
 Job for smbd.service failed because the control process exited with error code. See "systemctl status smbd.service" and "journalctl -xe" for details.
 invoke-rc.d: initscript smbd, action "start" failed.
 dpkg: error processing package samba (--configure):
  subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
NmbdLog:
 Packet send failed to 192.168.0.255(138) ERRNO=Invalid argument
   Packet send failed to 192.168.0.255(138) ERRNO=Invalid argument
   Packet send failed to 192.168.0.255(138) ERRNO=Invalid argument
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.10ubuntu1
SambaServerRegression: No
SmbConfIncluded: Yes
SmbLog:

SourcePackage: samba
Title: package samba 2:4.3.9+dfsg-0ubuntu0.16.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Andreas Hasenack (ahasenack)]

You have an invalid setting for the "security" parameter in smb.conf:

# testparm ./smb.conf
Load smb config files from ./smb.conf
rlimit_max: increasing rlimit_max (1024) to minimum Windows limit (16384)
WARNING: The "syslog" option is deprecated
WARNING: Ignoring invalid value 'share' for parameter 'security'
Error loading services.

Valid values for the "security" parameter are auto, user, domain or ads.