This file is indexed.

preinst is in dbconfig-common 2.0.4ubuntu1.

This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.

The actual contents of the file can be viewed below.

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#!/bin/sh

set -e

# rather sensitive data can go here, so let's create the logfile
# ahead of time with safer permissions.
if [ ! -d /var/log/dbconfig-common ]; then
	mkdir /var/log/dbconfig-common
	touch /var/log/dbconfig-common/dbc.log
	chmod 600 /var/log/dbconfig-common/dbc.log
fi