This file is indexed.

prerm is in dhcpcd 1:3.2.3-11.

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

rm -f /etc/dhcpc/duid-inhibit  

if [ "$1" != "upgrade" ]; then
        update-alternatives --remove dhcpcd /sbin/dhcpcd3
fi