systemd-machine-id-setup — Initialize the machine ID in /etc/machine-id
systemd-machine-id-setup
systemd-machine-id-setup may be used by
system installer tools to initialize the machine ID stored in
/etc/machine-id at install time with a
randomly generated ID. See
machine-id(5)
for more information about this file.
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.
Similar, 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 Container Interface.
Use systemd-firstboot(1) to initialize the machine ID on mounted (but not booted) system images.