Run the following command to create the kmdata.tar file..

sudo tar -cvf kmdata.tar -C /opt/nfast <kmdata_dir>/config <kmdata_dir>/local cknfastrc

Where <kmdata_dir> is the path of the folder described in Creating the kmdata folder. For example:

sudo tar -cvf kmdata.tar -C /opt/nfast kmdata/config kmdata/local cknfastrc