This file is indexed.

prerm is in spf-tools-perl 2.9.0-4.

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

mode=$1

source_package=mail-spf-perl

case "$mode" in
  remove )
    update-alternatives --remove spfquery /usr/bin/spfquery.$source_package
    update-alternatives --remove spfd     /usr/sbin/spfd.$source_package
    ;;
esac