sudo apt install zfsutils-linux
export ZFS_DISK=usb-Realtek_RTL_012345679039-0\:0-part2
export ZFS_POOL=backup
export ZFS_DATASET=some_dataset
sudo zpool import -d $ZFS_DISK $ZFS_POOL
sudo zfs load-key -a
sudo zfs set mountpoint=/mnt/zfs $ZFS_POOL/$ZFS_DATASET
sudo zfs mount $ZFS_POOL/$ZFS_DATASET