MOUNT.NFS(8) System Manager's Manual MOUNT.NFS(8)NAME
mount.nfs, mount.nfs4 - mount a Network File System
SYNOPSIS
mount.nfs remotetarget dir [-rvVwfnsh ] [-o options]
DESCRIPTION
mount.nfs is a part of nfs(5) utilities package, which provides NFS client functionality.
mount.nfs is meant to be used by the mount(8) command for mounting NFS shares. This subcommand, however, can also be used as a standalone
command with limited functionality.
remotetarget is a server share usually in the form of servername:/path/to/share. dir is the directory on which the file system is to be
mounted.
Under Linux 2.6.32 and later kernel versions, mount.nfs can mount all NFS file system versions. Under earlier Linux kernel versions,
mount.nfs4 must be used for mounting NFSv4 file systems while mount.nfs must be used for NFSv3 and v2.
OPTIONS -r Mount file system readonly.
-v Be verbose.
-V Print version.
-w Mount file system read-write.
-f Fake mount. Don't actually call the mount system call.
-n Do not update /etc/mtab. By default, an entry is created in /etc/mtab for every mounted file system. Use this option to skip making
an entry.
-s Tolerate sloppy mount options rather than fail.
-h Print help message.
nfsoptions
Refer to nfs(5) or mount(8) manual pages.
NOTE
For further information please refer nfs(5) and mount(8) manual pages.
FILES
/etc/fstab file system table
/etc/mtab table of mounted file systems
SEE ALSO nfs(5), mount(8),
AUTHOR
Amit Gud <agud@redhat.com>
5 Jun 2006 MOUNT.NFS(8)
Check Out this Related Man Page
MOUNT.FEDFS(8) System Manager's Manual MOUNT.FEDFS(8)NAME
mount.fedfs - mount a FedFS domain root
SYNOPSIS
mount.fedfs remotedir localdir [-fhnrsvVw] [-o options]
DESCRIPTION
RFC 5716 introduces the Federated File System (FedFS, for short). FedFS is an extensible standardized mechanism by which system adminis-
trators construct a coherent namespace across multiple file servers using file system referrals. For further details, see fedfs(7).
The mount.fedfs(8) command locates FedFS domains by looking for DNS SRV records that advertise file servers exporting FedFS domain root
replicas. The remotedir argument determines what FedFS domain is mounted and what network file system protocol is used.
The mount.fedfs(8) command sorts the list of available domain root replicas according to the SRV record sorting rules outlined in RFC 2782.
It attempts to contact each file server appearing in the SRV record list until a mount request succeeds or the end of the SRV record list
is reached.
Command line arguments
The first argument, remotedir, is the globally useful name to mount. Globally useful names are discussed in more detail in fedfs(7).
The second argument, localdir, specifies the local directory on which to mount the requested FedFS globally useful name. As with other
file systems, localdir must exist on the client for a mount request to succeed.
The mount.fedfs(8) command converts the specified remotedir and localdir arguments, along with information obtained via DNS SRV queries, to
arguments suitable for a local mount request. It then forks and execs the appropriate file system mount subcommand (such as the
mount.nfs(8) subcommand) to mount the file server where the domain root resides.
Because an unmodified file system mount subcommand is used for the actual mount operation, the file system's equivalent umount subcommand
is all that is required to unmount this mount point when it is finished being used.
Mount option inheritance
The Linux NFS client treats an NFS referral as a server-initiated mount request. The referring fileserver provides only a list of server
names and export paths. The mount options for this new mount are inherited from the new mount point's parent directory on the client.
As applications proceed deeper into a domain's namespace, they can encounter both file sets to which they have read-only access, and file
sets to which they have read-write access. To allow applications proper access to both types of file sets, typically file-access clients
mount domain root directories in read-write mode. All submounts of the domain root are then mounted read-write as well. Write access is
then controlled by fileservers.
For example, a domain root may contain an NFS version 4 referral to an export containing user home directories. The domain root may be
exported read-only so file-access clients cannot update it, but user home directories would not be very useful if they could not be written
to by their owners. The fileserver continues to employ user credentials to limit access as appropriate.
Network file system clients follow file system referrals as applications encounter them, which is similar to how an automounter works.
Consider the initial mount of the domain root as if you are mounting a single whole file system, even though underneath, additional NFS
mounts come and go as needed.
Options
-f, --fake
Fake mount. This option is ignored by mount.fedfs(8) but is passed to the underlying file system mount subcommand.
-h, --help
Print the mount.fedfs(8) usage message and exit.
-n, --no-mtab
Do not update /etc/mtab. This option is ignored by mount.fedfs(8) but is passed to the underlying file system mount subcommand.
-o, --options options
Specify mount options for this mount point and all submounts. These are ignored by mount.fedfs(8) but are passed to the underlying
file system mount subcommand. For further details, refer to mount(8).
-r, --ro, --read-only
Mount the domain root and all submounts read-only.
-s, --sloppy
Tolerate unrecognized mount options. This is ignored by mount.fedfs(8) but is passed to the underlying file system mount subcom-
mand.
-v, --verbose
Report more information during the mount process. This affects mount.fedfs(8) and is also passed to the underlying file system
mount subcommand.
-V, --version
Print version information for mount.fedfs(8) and exit.
-w, --rw, --read-write
Mount the domain root and all submounts read-write. This is the default behavior.
EXAMPLES
To mount the domain root of the example.net FedFS domain via NFS version 4 automatically, you might add this to your /etc/fstab:
/nfs4/example.net /nfs4/example.net fedfs defaults 0 0
A FedFS domain root can also be mounted with a stand-alone invocation of mount(8):
# mount -t fedfs /nfs4/example.net /mnt/fedfs
This mounts the FedFS domain root for the example.net domain on the client's /mnt/fedfs directory. A simple
# umount /mnt/fedfs
unmounts it when you are finished with it.
FILES
/etc/fstab filesystem table
/etc/mtab table of mounted file systems
SEE ALSO fedfs(7), nfs(5), mount(8), mount.nfs(8)
RFC 2782 for a discussion of DNS SRV records
RFC 5661 for a description of NFS version 4 referrals
RFC 5716 for FedFS requirements and overview
COLOPHON
This page is part of the fedfs-utils package. A description of the project and information about reporting bugs can be found at
http://wiki.linux-nfs.org/wiki/index.php/FedFsUtilsProject.
AUTHOR
Chuck Lever <chuck.lever@oracle.com>
3 February 2014 MOUNT.FEDFS(8)