qemu-system-x86_64 -enable-kvm -usbdevice tablet
-boot d -cdrom image.iso # boot from iso
-m 512 # 512MB RAM
-netdev user,id=net0,hostfwd=tcp::8080-:80 -device e1000,netdev=net0 # redirect host 8080 to guest 80
qemu-img create mydisk.img 10G
qemu-system-x86_64 -boot d -cdrom image.iso -m 512 -hda mydisk.img
qemu-system-x86_64 -hda /dev/sdb -cdrom ~/kvm/mhdd32ver4.6.iso -boot d