This file is indexed.

preinst is in grub-efi-amd64 2.02~beta2-9.

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/bash
set -e

case "$1" in
  install|upgrade)
    if dpkg --compare-versions "$2" lt 1.98+20100804-2 && \
       test -h /etc/kernel/postrm.d/zz-update-grub; then
      rm -f /etc/kernel/postrm.d/zz-update-grub
    fi
    ;;
esac



exit 0