This file is indexed.

prerm is in lubuntu-default-settings 0.27.

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

set -e

if [ "$1" = "remove" ] ; then
  update-alternatives --remove lxdm.conf /etc/xdg/lubuntu/lxdm/lxdm.conf
  update-alternatives --remove lightdm-gtk-greeter-config-derivative \
    /etc/xdg/xdg-xubuntu/lightdm/lightdm-gtk-greeter.conf
fi

# Automatically added by dh_installdeb
dpkg-maintscript-helper mv_conffile /etc/xdg/pcmanfm/lubuntu.conf /etc/xdg/pcmanfm/lubuntu/pcmanfm.conf 0.15 -- "$@"
# End automatically added section

exit 0