Thanks for your report.
The relevant error is
---
Setting up samba-common (2:3.4.7~dfsg-1ubuntu3) ...
Not replacing deleted config file /etc/samba/smb.conf
Install/upgrade will fail. To recover, please try:
sudo cp /usr/share/samba/smb.conf /etc/samba/smb.conf
sudo dpkg --configure -a
dpkg: error processing samba-common (--configure):
subprocess installed post-installation script returned error exit
status 1
To recover, could you please try the suggested steps. I'm closing this report
because it's not a bug with Ubuntu or samba.
Don't hesitate to submit any new bug.
** Package changed: ubuntu => samba (Ubuntu)
** Changed in: samba (Ubuntu)
Status: New => Invalid
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package samba-common 2:3.4.7~dfsg-1ubuntu3 failed to install/upgrade:
subprocess installed post-installation script returned error exit status 1
https://bugs.launchpad.net/bugs/566869
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