NAME

       rpc.nfsd - NFS server process

SYNOPSIS

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

DESCRIPTION

       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.

OPTIONS

       -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.

NOTES

       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.

SEE ALSO

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

AUTHOR

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

                                                   7 Aug 2006                                        rpc.nfsd(8)