This file is indexed.

prerm is in ukwm 1.1.8-0ubuntu1.

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

action="$1"

if [ "$action" = remove ]; then
    update-alternatives --remove x-window-manager \
        /usr/bin/ukwm
fi