This file is indexed.

postinst is in gummiboot 48-1.

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
# postinst script for gummiboot

set -e

. /etc/default/gummiboot

if [ "$1" = "configure" -a "$2" = "" ]; then
    for kernel in /boot/vmlinuz-*; do
        update-gummiboot $(echo $kernel | cut -f2- -d-)
    done
fi

if [ "$1" = "configure" ]; then
    gummiboot update --path="$GUMMIBOOT_EFI" || :
fi