TIL on #Linux /proc/sys/kernel/random/uuid generates a new UUID each time you read it https://www.kernel.org/doc/html/latest/admin-guide/sysctl/kernel.html#random
$ cat /proc/sys/kernel/random/uuid
8e6dfaf5-5157-462e-9bf3-932dfbe24096
$ cat /proc/sys/kernel/random/uuid
47856f9a-7c1e-44d0-8301-9c4e6de9fa24