root@cosmos:~# kvm -m 256 -cdrom ubuntu-11.04-server-amd64.iso -drive file=server.img,index=0 -boot d -net nic -net user -nographic -vnc :0
kvm: pci_add_option_rom: failed to find romfile "pxe-rtl8139.bin"
inet_listen_opts: bind(ipv4,0.0.0.0,5900): Address already in use
inet_listen_opts: FAILED