First of all, open VirtualBox, and go to Tools > Import Appliance. Click on the Browse icon next to File, and navigate to the location where you stored your .OVA file and select it. Click on Next.

Step 3: The OVA file appears in the file field. Click Next to continue. Step 4: Leave all the default appliance settings alone, and click the Import button to continue.

Once your .ova file has exported, relocate it to the new hosting server. On the new server, open a terminal and import that virtual appliance with the command: vboxmanage import ubuntu_server_new.ova ...

How to import a VM to an appliance. Move the exported .ova file to the new host server. Open VirtualBox. Click File | Import Appliance. Locate the .ova file. Click Next. Review the Appliance settings.