You don't need the VirtualBox Guest Additions unless you want a shared clipboard and folder between the host and guest OSes, and those create security risks (for example, a password copied into the host clipboard could be read by a malicious app on the guest OS). You can follow this guide without installing guest additions. You can also just download the Whonix Gateway and Workstation, import the appliances into VirtualBox and start them, no long installation steps necessary and it's safer because Tor runs in a separate VM. Alternatively, you can replace the default Whonix Workstation with the Lubuntu VM that pine describes here, you just have to manually set the networking to: gateway: 192.168.0.10 netmask: 255.255.255.0 ip address: 192.168.0.50 dns address: 192.168.0.10 More info on running any OS with Whonix can be found here: https://www.whonix.org/wiki/Other_Operating_Systems That's basically it.