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rpc.mountd(8)               System Manager's Manual              rpc.mountd(8)



NAME
       rpc.mountd - NFS mount daemon

SYNOPSIS
       /usr/sbin/rpc.mountd [options]

DESCRIPTION
       The  rpc.mountd program implements the NFS mount protocol. When receiv-
       ing 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  dae-
       mon.

       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 proce-
       dure. 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. Valid kinds are: all, auth, call, general and
              parse.

       -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 to leave the limit unchanged.

       -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.



                                  25 Aug 2000                    rpc.mountd(8)