A script to update a Kali Linux installation without prompting for user input

noninteractive_kali_update.sh

#!/usr/bin/env bash

sudo /usr/bin/env bash -p <<ENDROOT
export DEBIAN_FRONTEND=noninteractive
ex +"%s@DPkg@//DPkg" -cwq /etc/apt/apt.conf.d/70debconf
echo 'libc6:amd64     libraries/restart-without-asking        boolean true' | debconf-set-selections
dpkg-reconfigure debconf -f noninteractive -p critical
apt-get update
apt-get --assume-yes dist-upgrade
ENDROOT