Unique Universal Identification (UUID)


I was hoping someone could help me with the following.

When flashing the Jetson Xavier NX

  • Is the device given an unique universal ID (UUID) or is this something I would have to create myself?

If this is part of the flashing process

  • Is it a security measure?
  • If I were to flash a number of devices would it be possible to flash them so they have the same UUID?

Thank you in advance,


hello gavin14,

are you going to enable Jetson security? or, simply for image flashing?
you may using https://developer.nvidia.com/drive/sdk-manager for setting up development environment.

Note that if this is an eMMC model, then there are security fuses you can burn with a key. Once you do that though much of the content can only be flashed with that key (this is not encryption). I don’t think there is such an ability with SD card models.

Hello JerryChang and linuxdev,

Thank you both for your reply.

When flashing the dev kit, I am flashing to an external eMMC SSD, which has an image of various scripts and content.

The dev kit I am working on was originally flashed this way by my predecessor. He has set me the challenge of recreating his method, but I was having difficulty until he briefly explained that there is a UUID file in the “bootloader” folder of the NVIDIA filesystem used for flashing (I am not using the SDK Manager).

I am trying to understand;

• Was the UUID (file) created when flashing, or was it created manually?
    ◦ (Where does the UUID come from?)

• Can it be changed?
    ◦ (IF the UUID is created when flashing (not created manually), is it created randomly  each time and is it possible to make the UUID the same if I were to flash a number of devices?)

• How is the UUID used?
    ◦ (Would I be correct to believe that there is a script on the external eMMC SSD that verifies the presents of the UUID when the dev kit starts up?)

Are you aware of any documentation that could give me a better understanding of a UUID?

Thank you for your time.


hello gavin14,

typically, you can find the UUID of all the disk partitions by running blkid commands.
this UUID doesn’t change unless you format/delete the disk, it’ll generate a new UUID for the new filesystem.

Hello JerryChang,

Thank you for your reply, it was very helpful!

Kind Regards,


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