Vnconfig
From FreeBSDwiki
vnconfig is the command used under FreeBSD 4.x and prior to create RAMdisks or mount ISOs as filesystems. It has been superseded by mdconfig as of FreeBSD 5.x.
vnconfig is the command used under FreeBSD 4.x and prior to create RAMdisks or mount ISOs as filesystems. It has been superseded by mdconfig as of FreeBSD 5.x.