postinst is in autodns-dhcp 0.8ubuntu1.
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.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | #! /bin/sh
set -e
case "$1" in
    configure)
	echo
	echo Remember that before using autodns-dhcp you must configure
	echo the dhcp and bind servers as well as the package itself.
	echo To know how to do this have a look at the documentation of
	echo the package at /usr/share/doc/autodns-dhcp/
    ;;
    abort-upgrade|abort-remove|abort-deconfigure)
    ;;
    *)
	echo "postinst called with unknown argument \$1'" >&2
	exit 0
    ;;
esac
exit 0
 |