This file is indexed.

prerm is in plymouth-theme-ubuntu-text 0.8.2-2ubuntu30.

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 [ "x$1" = xremove ]; then
	update-alternatives \
		--remove text.plymouth /lib/plymouth/themes/ubuntu-text/ubuntu-text.plymouth

	rm -f /lib/plymouth/themes/ubuntu-text/ubuntu-text.plymouth
fi