Script to instantly create a temporary fresh install of Debian, no root access required (needs fakechroot, fakeroot, debootstrap)

instant-debian

#!/bin/bash
set -euo pipefail

assure_command() {
  if ! command -v "$1" &> /dev/null; then
    echo "$1 is required to run this script"
    echo "Run: apt install $1"
    exit 1
  fi
}

assure_command fakechroot
assure_command fakeroot

DIR="$(mktemp -d)"

cleanup() {
  rm -rf "$DIR"
}
trap cleanup EXIT

SUITE="${1:-stable}"
echo "Installing debian $SUITE..."
fakechroot fakeroot debootstrap "$SUITE" "$DIR"
fakechroot fakeroot chroot "$DIR" /bin/bash