EXPORTFS(8) System Manager's Manual EXPORTFS(8)
exportfs - export and unexport directories to NFS clients
/usr/etc/exportfs [ -aiuv ] [ -o options ] [ pathname ]
exportfs makes a local directory or filename available for mounting
over the network by NFS clients. It is normally invoked at boot time
by the /etc/rc.local script, and uses information contained in the
/etc/exports file to export pathname (which must be specified as a full
pathname). The super-user can run exportfs at any time to alter the
list or characteristics of exported directories and filenames. Direc-
tories and files that are currently exported are listed in the file
With no options or arguments, exportfs prints out the list of directo-
ries and filenames currently exported.
-a All. Export all pathnames listed in /etc/exports, or if -u is
specified, unexport all of the currently exported pathnames.
-i Ignore the options in /etc/exports. Normally, exportfs will
consult /etc/exports for the options associated with the
-u Unexport the indicated pathnames.
-v Verbose. Print each directory or filename as it is exported or
Specify a comma-separated list of optional characteristics for
the pathname being exported. options can be selected from
ro Export the pathname read-only. If not specified, the
pathname is exported read-write.
Export the pathname read-mostly. Read-mostly means
exported read-only to most machines, but read-write to
those specified. If not specified, the pathname is
exported read-write to all.
If a request comes from an unknown user, use UID as the
effective user ID. Note: root users (UID 0) are always
considered "unknown" by the NFS server, unless they are
included in the root option below. The default value for
this option is the UID of the user "nobody". If the user
"nobody" does not exist then the value 65534 is used.
Setting the value of "anon" to 65535 disables anonymous
access. Note: by default secure NFS accepts insecure
requests as anonymous, and those wishing for extra secu-
rity can disable this feature by setting "anon" to 65535.
Give root access only to the root users from a specified
hostname. The default is for no hosts to be granted root
Give mount access to each client listed. A client can
either be a hostname, or a netgroup (see netgroup(5)).
Each client in the list is first checked for in the
/etc/hosts database, and then the /etc/netgroup database.
The default value allows any machine to mount the given
secure Require clients to use a more secure protocol when
accessing the directory.
/etc/exports static export information
/etc/xtab current state of exported pathnames
exports(5), netgroup(5), showmount(8)
You cannot export a directory that is either a parent- or a sub-direc-
tory of one that is currently exported and within the same filesystem.
It would be illegal, for example, to export both /usr and /usr/local if
both directories resided in the same disk partition.
7 October 1990 EXPORTFS(8)