I tried to do a simple traffic isolation in this article https://www.howtoforge.com/how-to-set-up-a-tor-middlebox-routing-all-virtualbox-virtual-machine-traffic-over-the-tor-network and its comments , I installed the package "bridge-utils", in the adding the configuation items to /etc/network/interfaces, the path isn't existed in my SUSE Leap, does anybody know which configure file is similar to this?
Are you trying to implement something like Whonix but in a different way? Just use Whonix and be done.
no, I'm not using whonix this way. run multiple OSs in 2GB DDR machine is really diffical.
In that case, this has nothing to do with Whonix and we won't be able to help you.
Have a nice day,
Of course its difficult when you have so little RAM. Either upgrade it or buy another machine. Virtualization is resource demanding.