Bjarne VerschorrePrenote
This guide is written for Ubuntu-based (Linux Mint, Ubuntu, …) systems. The commands may differ on other distributions. This will make it ready to use for systems like Whonix↗.
Install KVM and Virtmanager
$ sudo apt install qemu-kvm libvirt-clients libvirt-daemon-system bridge-utils libguestfs-tools genisoimage virtinst libosinfo-bin virt-manager dnsmasq iptables$ sudo adduser $USER libvirt$ sudo adduser $USER libvirt-qemu$ sudo adduser $USER kvm$ sudo reboot
Network setup
$ sudo virsh -c qemu:///system net-autostart default$ sudo virsh -c qemu:///system net-start default