rescue_configure() {
	local hostname="${1}"
	# apt / conf
	printf "\
Acquire::AllowInsecureRepositories False;
Acquire::AllowWeakRepositories False;
Acquire::AllowDowngradeToInsecureRepositories False;
Acquire::Check-Valid-Until True;
APT::Install-Recommends False;
APT::Install-Suggests False;
APT::Get::Show-Versions True;
Dir::Etc::SourceParts \"\";
Dpkg::Progress True;
" >"/etc/apt/apt.conf.d/apt.conf"
	# apt / sources
	apt_sources_write
	# bash / rc
	main_link_bashrc
	mv .bashrc .bashrc.old
	# host name
	hostname "${hostname}"
	# locales
	printf "\
en_US.UTF-8 UTF-8
fr_FR.UTF-8 UTF-8
" >"/etc/locale.gen"
	# generate locales
	locale-gen
	# update catalog
	apt_update
	# disable frontend
	debian_disable_frontend
	# install backports
	apt_install_backports "tmux"
	# install packages
	apt_install_release "apt-file" "mosh" "screen" "byobu"
	# update catalog
	apt_update
}

rescue_install() {
	# update catalog
	apt_update
	# disable frontend
	debian_disable_frontend
	# upgrade packages
	apt_upgrade
	# install packages
	apt_install_release \
		"man-db" \
		"dmidecode" "efibootmgr" "lshw" "pciutils" "usbutils" \
		"parted" "mdadm" "cryptsetup-bin" "lvm2" \
		"btrfs-progs" "dosfstools" "duperemove" "squashfs-tools" \
		"git" "micro" "nano" "python3" "rsync" "vim" \
		"exa" "lf" "ncdu" "nnn" "ranger" "tree" \
		"file" "htop" "iotop" "ipcalc" "libdigest-sha3-perl" "lsof"
	# install backports
	apt_install_backports \
		"grub-pc-bin" \
		\
		"grub-efi-amd64-bin"
}

rescue_upload() {
	local host="${1}"
	local hostname="${2}"
	if [ -n "${hostname}" ]; then
		local user="root"
		#
		local user_host="${user}@${host}"
		# remove fingerprints
		ssh-keygen -R "${host}"
		# copy ssh id
		ssh-copy-id \
			-o "StrictHostKeyChecking=accept-new" \
			"${user_host}"
		# upload root
		rsync --delete --recursive \
			"$(main_env_root)" "${user_host}:/etc"
		# call setup
		# TODO variable
		ssh "${user_host}" -- "\
. \"/etc/bash/main.sh\" ; rescue_configure \"${hostname}\""
		# create session
		ssh "${user_host}" -- byobu new-session -d
		# send keys
		ssh "${user_host}" -- byobu send-keys "rescue_install" "C-m"
		# attach session
		mosh "${user_host}" -- byobu attach-session
	else
		echo "host & hostname"
		return 1
	fi
}

rescue_wipe_1_zero() {
	fs_wipe "/dev/mapper/crypt" "512M"
}

rescue_wipe_3_close() {
	umount "/media/boot"
	umount "/media/crypt" &&
		cryptsetup luksClose "crypt"
}