This file is indexed.

postinst is in linux-modules-extra-4.15.0-22-generic 4.15.0-22.24.

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=4.15.0-22-generic
image_path=/boot/vmlinuz-$version

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

depmod -a -F /boot/System.map-$version $version || true
if [ -d /etc/kernel/postinst.d ]; then
    mkdir -p /usr/lib/linux/triggers
    cat - >/usr/lib/linux/triggers/$version <<EOF
DEB_MAINT_PARAMS="$*" run-parts --report --exit-on-error --arg=$version \
	    --arg="$image_path" /etc/kernel/postinst.d
EOF
    dpkg-trigger --no-await linux-update-$version
fi

exit 0