This file is indexed.

postinst is in isc-dhcp-server-ldap 4.2.4-7ubuntu12.

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 

# Removes the left over diversions of the old package

if [ "$1" = remove -o "$1" = upgrade ]; then
	for v in `list_versions`; do
	        dpkg-divert --package isc-dhcp-server-ldap --remove \
			--rename --divert /usr/sbin/dhcpd-noldap \
			/usr/sbin/dhcpd
	done
fi