virt-install --name winserver2016 --memory 8192 --vcpus 4 --network network=default --disk path=ws2016.qcow2,format=qcow2,device=disk --cdrom /home/iso/cn_windows_server_2016_updated_feb_2018_x64_dvd_11636703.iso --graphics vnc,listen=0.0.0.0 --virt-type kvm --os-type windows --os-variant win2k16

mkdir /home/vms/centos7-image1

qemu-img create -f qcow2 /home/vms/centos7/centos7.qcow2 10G

virt-install --virt-type kvm --name centos7 --ram 2048 --disk /home/vms/centos7/centos7.qcow2,format=qcow2 --network network=default --graphics vnc,listen=0.0.0.0 --noautoconsole --os-type=linux --os-variant=centos7.0 --location=/home/iso/CentOS-7-x86_64-Minimal-1810.iso