This file is indexed.

postinst is in libpam-ldap 186-4ubuntu1.

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

 account=1170fa7f8d78efefb69d4f744d88b8a1
    auth=a1a966fd7f4693917727834d3569e8dd
password=94888efb331555074e6ce9b13dbdaf77
 session=dd5ab3071f6a3d94388a12a93d04cd8c

force=
if dpkg --compare-versions "$2" lt-nl 184-4ubuntu2; then
	# If we're upgrading from an older libpam-ldap,
	# and the pam configuration precisely matches that
	# which was written by auth-client-config (via ldap-auth-config), we
	# can safely force the pam-auth-update.
	force=--force
	for type in auth account session password
	do
		sum="$(md5sum /etc/pam.d/common-$type 2>/dev/null | awk '{ print $1 }')"
		[ "$sum" = "$(eval echo \$$type)" ] || force=
	done
fi
pam-auth-update --package $force