$ sudo apt-get install qemu-kvm $ sudo apt-get install libvirt-bin $ sudo apt-get install virtinst $ cd /etc $ diff -U 0 sysctl.conf.Bup sysctl.conf --- sysctl.conf.Bup 2011-12-05 20:45:35.000000000 +0900 +++ sysctl.conf 2013-11-20 12:26:39.448887718 +0900 @@ -28 +28 @@ -#net.ipv4.ip_forward=1 +net.ipv4.ip_forward=1 $ sudo sysctl -p $ sudo virsh net-dumpxml default <network> <name>default</name> <