This file is indexed.

prerm is in linux-image-4.15.0-1018-azure 4.15.0-1018.18.

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

version=4.15.0-1018-azure
image_path=/boot/vmlinuz-$version

if [ "$1" != remove ]; then
    exit 0
fi

linux-check-removal $version

if [ -d /etc/kernel/prerm.d ]; then
    DEB_MAINT_PARAMS="$*" run-parts --report --exit-on-error --arg=$version \
	      --arg=$image_path /etc/kernel/prerm.d
fi

exit 0