| -a UID |
Uses the UID parameter as the effective user ID only
if a request comes from an unknown user. The default value of this
option is -2. Note: Root users (uid 0) are always considered "unknown"
by the NFS server, unless they are included in the root option. Setting
the value of UID to -1 disables anonymous access. The UID parameter can be either uid or username.
|
| -B |
Updates the entry in the /etc/exports file and the exportfs command is executed to again export the directory immediately. |
| -c HostName [ , HostName ]
... |
Gives mount access to each of the clients listed. A client
can either be a host or a netgroup. The default is to allow all hosts
access. |
| -d Directory |
Specifies the exported directory that is to be changed. |
| -D {yes | no} |
Enables or disables file delegation for the specified export.
This option overrides the system-wide delegation enablement for this
export. The system-wide enablement is done through nfso. |
| -e ExternalName |
Exports the directory specified by the ExternalName parameter. The external name must begin with the nfsroot name. This option is useful if you have
run the chnfs -r command to change root
to something other than /. See the description
of the /etc/exports file for a description
of the nfsroot name. This option applies
only to directories exported for access by the NFS version 4 protocol. |
| -f Exports_file |
Specifies the full path name of the exports file to use if
other than the /etc/exports file. |
| -G rootpath@host[+host][:rootpath@host[+host]] |
A namespace referral will be created at the
specified path. The referral directs clients to the specified alternate
locations where they can continue operations. A referral is a special
object. If a nonreferral object exists at the specified path, the
export is disallowed and an error message is printed. If nothing exists
at the specified path, a referral object is created there that includes
the path name directories leading to the object. A referral cannot
be specified for the nfsroot. The name localhost cannot be used as a hostname. The -G option is allowed only
for version 4 exports. If the export specification allows version
2 or version 3 access, an error message will be printed and the export
will be disallowed. The administrator should ensure that appropriate
data exists at the referral locations. The -G option is available only on AIX 5L™ Version 5.3 with the 5300-03 Recommended Maintenance package or later. Note: A
referral or replica export can only be made if replication is enabled
on the server. Use chnfs -R on to enable
replication.
|
| -g rootpath@host[+host][:rootpath@host[+host]] |
The specified directory will be marked with
replica information. If the server becomes unreachable by an NFS
client, the client can switch to one of the specified servers. This
option is only accessible using NFS version 4 protocol, and version
4 access must be specified in the options. Because the directory is
being exported for client access, specifying NFS version 2 or version
3 access will not cause an error, but the request will simply be ignored
by the version 2 or version 3 server. This option cannot be specified
with the -G flag. Only the host part of
each specification is verified. The administrator must ensure that
the specified rootpaths are valid and that
the target servers contain appropriate data. If the directory being
exported is not in the replica list, that directory will be added
as the first replica location. The administrator should ensure that
appropriate data exists at the replica locations. The -g option is available only on AIX® 5.3 with 5300-03 or later. Note: A referral or replica export can only be made if replication is enabled
on the server. Use chnfs -R on to enable
replication.
|
| -h Hostname [ , HostName ]
... |
Specifies which hosts have read-write access to the directory.
This option is valid only when the directory is exported read-mostly. |
| -I |
Adds an entry in the /etc/exports file so that the
next time the exportfs command is run, usually during system
restart, the directory will be exported. |
| -N |
Does not modify the entry in the /etc/exports file
but the exportfs command is run with the correct parameters
so that the export is changed. |
| -n |
Does not require client to use the more secure protocol.
This flag is the default. |
| -o Ordering |
Defines how the alternate locations list is generated from
the servers that are specified on the refer or replicas option of the exportfs command. The option applies only
to directories exported for access by NFS version 4 protocol. The Ordering parameter has the following values: - full
- All of the servers are scattered to form the combinations of alternate
locations.
- partial
- The first location of all combinations is fixed to the first server
that is specified on the refer or replicas option of
the exportfs command. The remaining locations besides the first
location are scattered as if they are scattered using the scatter=full method.
- none
- No scatter is to be used. The value can also be used to disable
scattering if you previously enabled it.
|
| -P |
Specifies that the exported directory is to be a public directory. |
| -p |
Specifies that the exported directory is not a public directory. |
| -r HostName [ , HostName ]
... |
Gives root users on specified hosts access to the directory.
The default is for no hosts to be granted root access. |
| -s |
Requires clients to use a more secure protocol when accessing
the directory. |
| -S flavor |
May be used in conjunction with the -c, -t, or -r options to specify which occurrence of
the option to change. Most exportfs options can be clustered
using the sec option. Any number of sec stanzas may
be specified, but each security method can be specified only once.
If the entry in /etc/exports specified by the -d option
contains a clause of the specified flavor, then that clause is updated
to reflect the new parameters. Otherwise, a new sec= clause
with the specified parameters will be appended to the current options
list. Allowable flavor values are: - sys
- UNIX authentication.
- dh
- DES authentication.
- none
- Use the anonymous ID if it has a value other than -1. Otherwise, a weak auth error is returned.
- krb5
- Kerberos. Authentication only.
- krb5i
- Kerberos. Authentication and integrity.
- krb5p
- Authentication, integrity, and privacy.
|
| -t Type |
Specifies one of the following types of mount access allowed
to clients: - rw
- Exports the directory with read-write permission. This is the
default.
- ro
- Exports the directory with read-only permission.
- remove
- You must specify the -t remove option with the -S flavor option. Both the security flavor and the type of mount
access (rw, ro, or rm) from the existing NFS
export for the specified security flavor are removed.
- rm
- Exports the directory with read-mostly permission. If this type
is chosen, the -h flag must be used to specify hosts that have
read-write permission.
|
| -v number [ , number
... ] |
The directory specified by the -d option
is made available to clients using the specified NFS versions. Valid
values are 2, 3, or 4. |
| -V ExportedVersion |
Specifies the version of the exported directory that is to
be changed. Valid version numbers are 2, 3 and 4. |
| -x |
Accepts the replica location information specified
with the -g option as-is. Does not insert the server's primary
hostname into the list if it is not present. This flag is intended
for use with servers with multiple network interfaces. If none of
the server's hostnames are in the replica list, NFSv4 clients might
treat the location information as faulty and discard it. |
| -X |
Enables the primary host name to be automatically inserted
into the replica list. If you do not specify the primary host name
of the server in the replica list, the host name is added as the first
replica location. |