This file is indexed.

prerm is in heimdal-clients 1.7~git20150920+dfsg-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 -e

if [ "$1" != "upgrade" ]
then
    for i in ftp pagsh
    do
	update-alternatives --remove $i /usr/bin/k$i
    done
	for i in kinit klist kswitch ksu kpasswd kdestroy kadmin ktutil
    do
	update-alternatives --remove $i /usr/bin/${i}.heimdal
    done
fi