This file is indexed.

prerm is in cpio 2.11+dfsg-5ubuntu1.

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

if [ "$1" = remove ]; then
    update-alternatives --remove mt /bin/mt-gnu
    if test -L /sbin/rmt && test /sbin/rmt -ef /usr/sbin/rmt; then
	rm -f /sbin/rmt
    fi
fi