download-and-extract-packages-that-contains-initd.sh

#!/usr/bin/env bash

set -e
set -x

mkdir recovery
cd recovery
# Iterate installed packages (pkgname=pkgversion)
for pkgfullname in `dpkg -l | grep '^ii' | awk '{print $2"="$3}'`; do
    # Get package name without version
    pkgname="$(echo "$pkgfullname"|awk -F= '{print $1}')"
    # Filter packages with files in /etc/init.d,
    # download it and extract into current directory
    dpkg-query -L "$pkgname" | \
        grep -F '/etc/init.d' > /dev/null && \
        apt-get download "$pkgfullname" && \
        dpkg -x "${pkgname}_"*.deb .
done