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.\"
.\" mountd(8)
.\"
.\" Copyright (C) 1999 Olaf Kirch <okir@monad.swb.de>
.TH rpc.mountd 8 "31 May 1999"
.SH NAME
rpc.mountd \- NFS mount daemon
.SH SYNOPSIS
.BI "/usr/sbin/rpc.mountd [" options "]"
.SH DESCRIPTION
The
.B rpc.mountd
program implements the NFS mount protocol. When receiving a MOUNT
request from an NFS client, it checks the request against the list of
currently exported file systems. If the client is permitted to mount
the file system,
.B rpc.mountd
obtains a file handle for requested directory and returns it to
the client.
.SS Exporting NFS File Systems
Making file systems available to NFS clients is called
.IR exporting .
.P
Usually, a file system and the hosts it should be made available to
are listed in the
.B /etc/exports
file, and invoking
.B exportfs -a
whenever the system is booted. The
.BR exportfs (8)
command makes export information available to both the kernel NFS
server module and the
.B rpc.mountd
daemon.
.P
Alternatively, you can export individual directories temporarily
using
.BR exportfs 's
.IB host : /directory
syntax.
.SS The rmtab File
For every mount request received from an NFS client,
.B rpc.mountd
adds an entry to the
.B /var/state/nfs/rmtab
file. When receiving an unmount request, that entry is removed.
user level part of the NFS service.
.P
However, this file is mostly ornamental. One, the client can continue
to use the file handle even after calling
.BR rpc.mountd 's
UMOUNT procedure. And two, if a client reboots without notifying
.BR rpc.mountd ,
a stale entry will remain in
.BR rmtab .
.SH OPTIONS
.TP
.\" This file isn't touched by mountd at all--even though it
.\" accepts the option.
.\" .BR \-f " or " \-\-exports-file
.\" This option specifies the exports file, listing the clients that this
.\" server is prepared to serve and parameters to apply to each
.\" such mount (see
.\" .BR exports (5)).
.\" By default, export information is read from
.\" .IR /etc/exports .
.TP
.BR \-N " or " \-\-no-nfs-version
This option can be used to request that
.B rpc.mountd
does not offer certain versions of NFS. The current version of
.B rpc.mountd
can support both NFS version 2 and the newer version 3. If the
NFS kernel module was compiled without support for NFSv3,
.B rpc.mountd
must be invoked with the option
.BR "\-\-no-nfs-version 3" .
.TP
.BR \-v " or " \-\-version
Print the version of
.B rpc.mountd
and exit.
.SH SEE ALSO
.BR rpc.nfsd (8),
.BR exportfs (8),
.BR exports (5),
.BR rpc.rquotad (8).
.SH FILES
.BR /etc/exports ,
.BR /var/state/nfs/xtab .
.SH AUTHOR
Olaf Kirch, H. J. Lu, G. Allan Morris III, and a host of others.
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