-a
Export or unexport all directories.
-o opts
Specify a list of export options in the same manner as in exports(5).
-i
Ignore the /etc/exports file, so that only default options and options given on the command line are used.
-r
Reexport all directories. It synchronizes /var/lib/nfs/etab with /etc/exports. It removes entries in /var/lib/nfs/etab which are deleted from /etc/exports, and remove any entries from the kernel export table which are no longer valid.
-u
Unexport one or more directories.
-f
In ‘new’ mode, flush everything out of the kernels export table. Any clients that are active will get new entries added by mountd when they make their next request.
-v
be verbose