08-18-2015
vbe another question please ... when i opened wikipedia page for that os i found the platforms (machines) are not limited to intel 80386 but there is others ... how does the book treat the machine .. does that vary in code .. code for every machine ?? or how does it treat this issue ... thanks
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LEARN ABOUT CENTOS
systemd-machine-id-setup
SYSTEMD-MACHINE-ID-SETUP(1) systemd-machine-id-setup SYSTEMD-MACHINE-ID-SETUP(1)
NAME
systemd-machine-id-setup - Initialize the machine ID in /etc/machine-id
SYNOPSIS
systemd-machine-id-setup
DESCRIPTION
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.
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 Container Interface[1].
OPTIONS
The following options are understood:
-h, --help
Prints a short help text and exits.
--version
Prints a short version string and exits.
EXIT STATUS
On success, 0 is returned, a non-zero failure code otherwise.
SEE ALSO
systemd(1), machine-id(5), dbus-uuidgen(1)
NOTES
1. Container Interface
http://www.freedesktop.org/wiki/Software/systemd/ContainerInterface
systemd 208 SYSTEMD-MACHINE-ID-SETUP(1)