How to get unique machine id?
BSD: cat /etc/hostid kenv -q smbios.system.uuid Linux: cat /var/lib/dbus/machine-id cat /etc/machine-id OS X: ioreg -rd1 -c IOPlatformExpertDevice | grep IOPlatformUUID Windows: reg query HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography /v MachineGuid
