This file is indexed.

prerm is in dovecot-lmtpd 1:2.2.33.2-1ubuntu4.

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 [ -d /run/systemd/system ]; then
	deb-systemd-invoke stop dovecot.socket || true
fi

if [ -x "/etc/init.d/dovecot" ]; then
	invoke-rc.d dovecot stop
fi