UUID

Universally Unique Identifier (UUID)

UUID Ubuntuusers 
Linux kernel module calculate hashes of devices
dm-verity
How to generate unique hardware hash?
generate consistent machine unique ID
How do I get the UUID of a partition and define a Bash variable as being equal to it?

Ein valider UUID lässt sich unter Linux durch den Befehl uuidgen oder
$ cat /proc/sys/kernel/random/uuid

erzeugen. Dem zweiten Dateisystem auf /dev/sdX kann dieser neue UUID zugeordnet werden:

$ tune2fs -U <UUID> /dev/sdX2

ifconfig eth0 | grep HWaddr | awk '{ print $NF}' | sed 's/://g'

$ uuidgen -r
$ uuidgen -t

$ blkdid
$ blkid | grep UUID=
$ ls -l /dev/disk/by-uuid
$ lsblk -f
$ lsblk -f | grep -v loop

Create a hash based on the UUIDs of your hard drive(s) instead:
$ blkid | grep -oP 'UUID="\K[^"]+' | sha256sum | awk '{print $1}'