Partitioning – Not sure in / etc / crypttab on Ubuntu 18.04

I have followed the following instructions:

Installing Ubuntu 18.04 with encrypted partitions on XPS 15 9550 with NVIDIA/CUDA/cuDNN/Tensorflow-GPU support


How can I install dual-boot encrypted Ubuntu with LUKS?

I have created a 4G swap partition on the encrypted LVM partition according to the last link, but not sure if the entry in the / etc / crypttab file should be used.

When I run:

blkid | swap grep

/ dev / mapper / vgroot-lvswap: UUID = "12345678987654321" TYPE = Swap

Does the entry have to be?

vgroot-lvswap UID = 12345678987654321 / dev / urandom swap, offset = 1024, digit = aes-xts-plain64