$ sudo vi /etc/exports
/Volumes/folder1 -maproot=nobodynfs	auto,user,nofail,noatime,nolock,intr,tcp,actimeo=1800	0	0
/Volumes/folder2 -maproot=nobody -network 192.168.0.0 -mask 255.255.255.0
$ sudo nfsd checkexports
$ sudo nfsd enable
Also enable, disable, start, stop, restart, update, status, checkexports, verbose.
$ showmount -e