Clone出來 Ubuntu VM雖然MAC addr不同, 但卻會同時向DHCP要求相同的IP; /etc/machine-id 都相同
sudo truncate -s 0 /etc/machine-id && \
sudo rm /var/lib/dbus/machine-id && \
sudo ln -s /var/lib/dbus/machine-id /etc/machine-id
https://blog.programster.org/fix-ubuntu-18-04-vm-guests-all-getting-the-same-ip?fbclid=IwAR3ptOYnMWW5CFs2RW8asafxXRXEPxxjO1W1iUY8HE2lHdlmYxPiStX95I4
https://jaylacroix.com/fixing-ubuntu-18-04-virtual-machines-that-fight-over-the-same-ip-address/?fbclid=IwAR3bifPhFGxxRgXrxoPyVha-P2zVOYPblCRwXNkbKbzGd634W6zW4M5fuQ8