Linux doesn't have a unified HWID concept the way Windows does. Each distro and each app collects fingerprints differently — there's no single MachineGuid analog.
What Linux apps usually pin to: /etc/machine-id (created at install), /sys/class/dmi/id/* (SMBIOS data), /sys/class/net/*/address (MACs), disk serials via lsblk. All of these are in /sys/.
Most Linux software (browsers, Steam Linux, Wine games) cares about MAC and machine-id only. The rest is read but not pinned to. So "HWID change" on Linux usually boils down to: regenerate /etc/machine-id and change MAC.
Our utility doesn't ship a Linux native build, but the concept is straightforward: dbus-uuidgen > /etc/machine-id plus ip link set X address Y. Five minutes of bash, no dedicated app.