virsh start centos6.6_1 --console
virsh console centos6.6_1
virsh shutdown centos6.6_1 (这个需要借助子机上的acpid服务)
virsh destroy centos6.6_1
virsh autostart centos6.6_1
virsh autostart --disable centos6.6_1
virsh list //只能列出启动的子机
virsh list --all //可以把所有子机都列出来
virsh destroy clone1
virsh undefine clone1
rm -f /data/clone1.img
virsh suspend centos6.6_1