rpc.mountd
This document was created by man2html using the manual pages.
Section: Maintenance Commands (8)
Updated: 25 Aug 2000
Index
Return to NetAdminTools
NAME
rpc.mountd - NFS mount daemon
SYNOPSIS
/usr/sbin/rpc.mountd [options]
DESCRIPTION
The
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,
rpc.mountd
obtains a file handle for requested directory and returns it to
the client.
Exporting NFS File Systems
Making file systems available to NFS clients is called
exporting.
Usually, a file system and the hosts it should be made available to
are listed in the
/etc/exports
file, and invoking
exportfs -a
whenever the system is booted. The
exportfs(8)
command makes export information available to both the kernel NFS
server module and the
rpc.mountd
daemon.
Alternatively, you can export individual directories temporarily
using
exportfs's
host:/directory
syntax.
The rmtab File
For every mount request received from an NFS client,
rpc.mountd
adds an entry to the
/var/lib/nfs/rmtab
file. When receiving an unmount request, that entry is removed.
user level part of the NFS service.
However, this file is mostly ornamental. One, the client can continue
to use the file handle even after calling
rpc.mountd 's
UMOUNT procedure. And two, if a client reboots without notifying
rpc.mountd ,
a stale entry will remain in
rmtab.
OPTIONS
- -d kind or --debug kind
-
Turn on debugging for kind.
- -F or --foreground
-
Run in foreground (do not daemonize)
- -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
exports(5)).
By default, export information is read from
/etc/exports.
- -h or --help
-
Display usage message.
- -o num or --descriptors num
-
Set the limit of the number of open file descriptors to num. The
default is 256.
- -N or --no-nfs-version
-
This option can be used to request that
rpc.mountd
do not offer certain versions of NFS. The current version of
rpc.mountd
can support both NFS version 2 and the newer version 3. If the
NFS kernel module was compiled without support for NFSv3,
rpc.mountd
must be invoked with the option
--no-nfs-version 3 .
- -n or --no-tcp
-
Don't advertise TCP for mount.
- -P
-
Ignored (compatibility with unfsd??).
- -p or --port num
-
Force
rpc.mountd
to bind to the specified port num, instead of using the random port
number assigned by the portmapper.
- -V or --nfs-version
-
This option can be used to request that
rpc.mountd
offer certain versions of NFS. The current version of
rpc.mountd
can support both NFS version 2 and the newer version 3.
- -v or --version
-
Print the version of
rpc.mountd
and exit.
TCP_WRAPPERS SUPPORT
This
rpc.mountd
version is protected by the
tcp_wrapper
library. You have to give the clients access to
rpc.mountd
if they should be allowed to use it. To allow connects from clients of
the .bar.com domain you could use the following line in /etc/hosts.allow:
mountd: .bar.com
You have to use the daemon name
mountd
for the daemon name (even if the binary has a different name).
For further information please have a look at the
tcpd(8)
and
hosts_access(5)
manual pages.
SEE ALSO
rpc.nfsd(8),
exportfs(8),
exports(5),
rpc.rquotad(8).
FILES
/etc/exports,
/var/lib/nfs/xtab.
AUTHOR
Olaf Kirch, H. J. Lu, G. Allan Morris III, and a host of others.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- Exporting NFS File Systems
-
- The rmtab File
-
- OPTIONS
-
- TCP_WRAPPERS SUPPORT
-
- SEE ALSO
-
- FILES
-
- AUTHOR
-
Return to NetAdminTools,