rpc.nfsd - NFS server process


   /usr/sbin/rpc.nfsd [options] nproc


   The rpc.nfsd program implements the user level part of the NFS service.
   The main functionality is handled by the nfsd kernel module.  The  user
   space  program merely specifies what sort of sockets the kernel service
   should listen on, what NFS versions it should  support,  and  how  many
   kernel threads it should use.

   The  rpc.mountd  server provides an ancillary service needed to satisfy
   mount requests by NFS clients.


   -d  or  --debug
          enable logging of debugging messages

   -H  or  --host hostname
          specify a particular hostname (or  address)  that  NFS  requests
          will  be  accepted  on.  By  default,  rpc.nfsd  will accept NFS
          requests on all known network addresses.  Note that lockd (which
          performs file locking services for NFS) may still accept request
          on all known network  addresses.   This  may  change  in  future
          releases of the Linux Kernel.

   -p  or  --port port
          specify  a  different  port  to  listen  on for NFS requests. By
          default, rpc.nfsd will listen on port 2049.

   -N  or  --no-nfs-version vers
          This option can be used to request that rpc.nfsd does not  offer
          certain  versions  of  NFS.  The current version of rpc.nfsd can
          support NFS versions 2,3,4 and the newer version 4.1.

   -s  or  --syslog
          By default, rpc.nfsd logs error messages (and debug messages, if
          enabled)  to  stderr.  This  option  makes  rpc.nfsd  log  these
          messages to syslog instead. Note that errors encountered  during
          option  processing  will still be logged to stderr regardless of
          this option.

   -T  or  --no-tcp
          Disable rpc.nfsd from accepting TCP connections from clients.

   -U  or  --no-udp
          Disable rpc.nfsd from accepting UDP connections from clients.

   -V  or  --nfs-version vers
          This option can be used to request that rpc.nfsd  offer  certain
          versions of NFS. The current version of rpc.nfsd can support NFS
          versions 2,3,4 and the newer version 4.1.

   nproc  specify the number of NFS server threads. By default,  just  one
          thread  is  started.  However,  for  optimum performance several
          threads should be used. The actual figure depends on the  number
          of  and  the  work load created by the NFS clients, but a useful
          starting point is 8 threads. Effects of  modifying  that  number
          can be checked using the nfsstat(8) program.

   Note  that  if  the NFS server is already running, then the options for
   specifying host, port, and protocol will be  ignored.   The  number  of
   processes  given  will be the only option considered, and the number of
   active nfsd processes will be increased  or  decreased  to  match  this
   number.   In particular rpc.nfsd 0 will stop all threads and thus close
   any open connections.


   If the program is  built  with  TI-RPC  support,  it  will  enable  any
   protocol and address family combinations that are marked visible in the
   netconfig database.


   nfsd(7),  rpc.mountd(8),   exports(5),   exportfs(8),   rpc.rquotad(8),
   nfsstat(8), netconfig(5).


   Olaf  Kirch,  Bill  Hawes, H. J. Lu, G. Allan Morris III, and a host of

                              7 Aug 2006                       rpc.nfsd(8)


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