[Bug 657392] Re: package dovecot-common 1:1.2.9-1ubuntu6.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[jan]

I have exactly the same experience. Trying to set up on:
Linux  2.6.32-27-generic #49-Ubuntu SMP Wed Dec 1 23:52:12 UTC 2010 i686 GNU/Linux

sudo dpkg --configure dovecot-common

results in:

Setting up dovecot-common (1:1.2.9-1ubuntu6.1) ...
Creating generic self-signed certificate:  /etc/ssl/certs/dovecot.pem
(replace with hand-crafted or authorized one if needed).
hostname: Name or service not known
dpkg: error processing dovecot-common (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 dovecot-common

I have no clue on how to tell the system where hostname resides.
Besides, hostname just works fine.

which hostname 
returns
/bin/hostname

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https://bugs.launchpad.net/bugs/657392

Title:
  package dovecot-common 1:1.2.9-1ubuntu6.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1