[ -n "$DEBCONF" ] || DEBCONF='yes'
[ -n "$DEBIAN_FRONTEND" ] || DEBIAN_FRONTEND='noninteractive'
[ -n "$DEBOOTSTRAP" ] || DEBOOTSTRAP='debootstrap'
[ -n "$DEBCONF" ] || DEBCONF='yes'
[ -n "$DEBIAN_FRONTEND" ] || DEBIAN_FRONTEND='noninteractive'
[ -n "$DEBOOTSTRAP" ] || DEBOOTSTRAP='debootstrap'