[Bug 365500] Re: package postfix None [modified: /var/lib/dpkg/info/postfix.list] failed to install/upgrade: subprocess pre-installation script returned error exit status 1

[Michael Vogt]

Selecting previously deselected package postfix.
Unpacking postfix (from .../postfix_2.5.5-1_amd64.deb) ...
debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable
dpkg: error processing /var/cache/apt/archives/postfix_2.5.5-1_amd64.deb (--unpack):
 subprocess pre-installation script returned error exit status 1

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package postfix None [modified: /var/lib/dpkg/info/postfix.list] failed to install/upgrade: subprocess pre-installation script returned error exit status 1
https://bugs.launchpad.net/bugs/365500
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