"On the BTX loader menu Select 3: Escape to loader prompt. Write those 2 lines:
and hit Enter!"
But somehow can't run FreeBSD 11 neither TrueOS 18 for different reasons, from
what i remember installed FreeBSD 11 on VirtualBox but workaround for newer
system wasn't working (checked back for older worked), switched DVD controler
from IDE to SATA in VBox and this helped for ISO like guy wrote in topic.