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  # virt-install -v --accelerate --nographics --vcpus 2 --name lightwave --ram 1024 --os-type linux --os-variant=ubuntu20.04 --network bridge:br0 --disk vol=boot/lightwave-boot.img,bus=virtio --disk vol=nvme-pool/lightwave-root,bus=virtio --import
 
  # virt-install -v --accelerate --nographics --vcpus 2 --name lightwave --ram 1024 --os-type linux --os-variant=ubuntu20.04 --network bridge:br0 --disk vol=boot/lightwave-boot.img,bus=virtio --disk vol=nvme-pool/lightwave-root,bus=virtio --import
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The VM will boot and probably fail to mount the root because the UUID changed.
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You can fix this by dropping into grub the usual way:
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* press ESC before the kernel starts
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* press e to edit a menu entry
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* modify the kernel command line (for example, root=/dev/vdb)
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* hit ctrl-x to boot
    
=== How to migrate a file-based guest to LVM (online method) ===
 
=== How to migrate a file-based guest to LVM (online method) ===