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If you have any trouble the VirtualBox documentation is here: https://www.virtualbox.org/manual/ch01.html#ovf
Other Hypervisors
To use OVF files with other virtualisation systems like KVM you may have to convert the OVF file to a native format; Two well-known tools for this purpose are virt-v2v (available in CentOS6/RHEL) and virt-convert (in Debian).
Fire up the VM and set the IP Address
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