Section: systemd-machine-id-setup (1)
This tool will execute no operation if /etc/machine-id is already initialized.
If a valid D-Bus machine ID is already configured for the system, the D-Bus machine ID is copied and used to initialize the machine ID in /etc/machine-id.
If run inside a KVM virtual machine and a UUID is passed via the -uuid option, this UUID is used to initialize the machine ID instead of a randomly generated one. The caller must ensure that the UUID passed is sufficiently unique and is different for every booted instanced of the VM.
Similarly, if run inside a Linux container environment and a UUID is set for the container this is used to initialize the machine ID. For details see the documentation of the m[blue]Container Interfacem.
The following options are understood:
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