Extract the ova file

1
$ tar -xvf vmName.ova

Modify ovf for some invalid tag

1
$ vi vmName.ovf

Re-calculate sha1 from vmName.ovf, then modify the hash value of vmName.mf

1
2
$ sha1sum vmName.ovf
$ vi vmName.mf

Package to ova which source files from [vmName.ovf, vmName-disk1.vmdk, vmName.mf]

1
$ tar -cvf vmName-NEW.ova vmName.ovf vmName-disk1.vmdk vmName.mf