This file is indexed.

postinst is in linux-signed-image-4.13.0-1018-azure 4.13.0-1018.21.

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

kernel='vmlinuz-4.13.0-1018-azure'

case "$0-$1" in
*.postinst-configure)
	rm -f /boot/$kernel.efi.signed
	cp /boot/$kernel /boot/$kernel.efi.signed
	sbattach --attach /usr/lib/linux/$kernel.efi.signature /boot/$kernel.efi.signed

	if which update-grub >/dev/null 2>&1; then
		update-grub || true
	fi
	;;
*.postrm-remove)
	rm -f /boot/$kernel.efi.signed

	if which update-grub >/dev/null 2>&1; then
		update-grub || true
	fi
	;;
esac



exit 0