Comment by carlsborg

6 years ago

True, more precisely - 16 bytes, 32 hex characters. Your link is in agreement "The machine ID is usually generated from a random source during system installation or first boot and stays constant for all subsequent boots." And See https://wiki.debian.org/MachineId at least one distro uses it for the DHCP ID.

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carlsborg

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JdeBP  6 years ago

"At least one distro" is not correct either. It's used by systemd-networkd, specifically.

* http://jdebp.uk./Softwares/nosh/guide/commands/machine-id.xm...

  • carlsborg  6 years ago

    Now you are nitpicking. Your new link says exactly this “ This broadcasts the machine ID (hashed with a known fixed salt) over the LAN as the unique client identifier part of the DHCP protocol. (Other DHCP clients tend to use MAC addresses for this.) It also broadcasts the machine ID locally on each link as part of Ethernet LLDP, if enabled.”

    • JdeBP  6 years ago

      It is far from nitpicking to point out the gross inaccuracy of conflating one particular software with an entire operating system. systemd-networkd is not Debian.

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