Running VMs with QEMU/KVM

Commands:

Create an image file
# qemu-img create -f qcow2 vm-disk1.qcow2 20G

Convert a vdi image to qcow2
# qemu-img convert -f vdi -O qcow2 Ubuntu-Server.vdi Ubuntu-Server.qcow2 -p -m10

Start a VM
# qemu-system-x86_64 -name LPIC3-Debian -enable-kvm -hda vm-disco1.qcow2 -cdrom /home/ricardo/Downloads/ISOs/debian-12.2.0-amd64-netinst.iso -boot d -m 2048 -smp cpus=2

# qemu-system-x86_64 -name LPIC3-Ubuntu -enable-kvm -hda Ubuntu-Server.qcow2 -m 2048 -smp cpus=2