UUID

Universally Unique Identifier (UUID)

UUID Ubuntuusers 
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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}'

$ cat /sys/class/dmi/id/board_serial
$ cat /sys/class/dmi/id/product_uuid
$ cat /etc/machine-id
$ cat /var/lib/dbus/machine-id
$ ip a | sed '\|^ *link[^ ]* |!d;s|||;s| .*||'
$ 

dbus_get_local_machine_id()