What are the unique system options in linux?

Question

linux

You need something unique for each linux system that can be entered into the database on a remote server and when sending a request to it, along with this unique variable, the server finds this entry and performs some further actions. The MAC address may be the same, but it can be easily changed to another one. Is there anything else like this?

Answer 1

Pull the serial number of the motherboard.
You can add the BIOS version.

Answer 2

machine-id

Answer 3

https://qna.habr.com/q/1066750

Answer 4

what have you tried, what doesn't work?

Answer 5

explode as delimiter \r\n

Answer 6

https://regex101.com/r/aS9lN9/1
var re = /([^,\x20]+)/g;