Virtualization on Linux#

QEMU with KVM#

QEMU with KVM gives near-native performance on Linux hosts and is the primary tested environment.

Install#

sudo apt install qemu-system-x86 qemu-kvm

Check that KVM is available:

kvm-ok

If KVM is not available, QEMU will still work but will run slower without hardware acceleration.

Boot a raw image#

qemu-system-x86_64 \
  -cdrom vitruvian.img -boot menu=on \
  -m 8G -cpu host -smp sockets=1,cores=2,threads=2 --enable-kvm \
  -netdev user,id=mynet,hostfwd=tcp::2222-:22 \
  -device virtio-net-pci,netdev=mynet

Adjust -m (RAM in MB) and -smp (CPU cores) to your host. Remove -enable-kvm if KVM is unavailable.

Boot an ISO#

qemu-system-x86_64 \
  -cdrom vitruvian.iso -boot menu=on \
  -m 8G -cpu host -smp sockets=1,cores=2,threads=2 --enable-kvm \
  -netdev user,id=mynet,hostfwd=tcp::2222-:22 \
  -device virtio-net-pci,netdev=mynet

Useful flags#

Flag	Purpose
`-display gtk`	Use a GTK window instead of SDL
`-display spice-app`	Use SPICE for better clipboard and display integration
`-cpu host`	Expose host CPU features to the guest (better compatibility)
`-snapshot`	Run without writing changes back to the image
`-serial stdio`	Print serial output to the terminal