From Linux Man Pages
rpc.nfsd - NFS server process
/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.o kernel module; the user space program merely starts the specified number of kernel threads.
The rpc.mountd server provides an ancillary service needed to satisfy mount requests by NFS clients.
OPTIONS
-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 diferent 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 ver-
sion of rpc.nfsd can support both NFS version 2,3 and the newer version 4.
-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.
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 pro-
cesses will be increased or decreased to match this number. In particular rpc.nfsd 0 will stop all threads and
thus close any open connections.
RELATED
rpc.mountd(8), exportfs(8), rpc.rquotad(8), nfsstat(8).
CATEGORY