​virt-install --virt-type=kvm --name=centos7-2 --vcpus=2 --memory=2048 --location=/root/iso/CentOS-8.1.1911-x86_64-dvd1.iso --disk path=/kvmdata/centos7-1511.img,size=10,format=qcow2 --network bridge=br0 --graphics none --extra-args='console=ttyS0' --force​