Handbook 3.4: /usr/obj/ Architecture-specific target tree produced by building the /usr/src tree. /usr/ports The FreeBSD Ports Collection (optional). /usr/sbin/ System daemons & system utilities (executed by users). /usr/share/ Architecture-independent files. /usr/src/ BSD and/or local source files. Every directory has a "/" in the end except "/usr/ports". Should be added.