kvm 建立子镜像(复制镜像)

kvm-img create -b ubuntu-server.img -f qcow2 server1.img 

Formatting 'server1.img', fmt=qcow2 size=5368709120 backing_file='ubuntu-server.img' encryption=off cluster_size=65536 

kvm -m 1000 -drive file=server1.img,if=virtio -smp 1,4 -k en-us 

kvm

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