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.\" Copyright (c) 1989, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\" must display the following acknowledgement:
.\" This product includes software developed by the University of
.\" California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" @(#)nfsd.8 8.3 (Berkeley) 2/22/94
.\"
.Dd February 22, 1994
.Dt NFSD 8
.Os
.Sh NAME
.Nm nfsd
.Nd remote
.Tn NFS
server
.Sh SYNOPSIS
.Nm nfsd
.Op Fl rut
.Op Fl n Ar num_servers
.Sh DESCRIPTION
.Nm Nfsd
runs on a server machine to service
.Tn NFS
requests from client machines.
At least one
.Nm nfsd
must be running for a machine to operate as a server.
.Pp
Unless otherwise specified, four servers for
.Tn UDP
transport are started.
.Pp
The following options are available:
.Bl -tag -width Ds
.It Fl r
Register the
.Tn NFS
service with
.Xr portmap 8
without creating any servers.
This option can be used along with the
.Fl u
or
.Fl t
options to re-register NFS if the portmap server is restarted.
.It Fl n
Specifies how many servers to create.
.It Fl t
Serve
.Tn TCP NFS
clients.
.It Fl u
Serve
.Tn UDP NFS
clients.
.El
.Pp
For example,
.Dq Li "nfsd -u -t 6"
serves
.Tn UDP
and
.Tn TCP
transports using six daemons.
.Pp
A server should run enough daemons to handle
the maximum level of concurrency from its clients,
typically four to six.
.Pp
.Nm Nfsd
listens for service requests at the port indicated in the
.Tn NFS
server specification; see
.%T "Network File System Protocol Specification" ,
RFC1094 and
.%T "NFS: Network File System Version 3 Protocol Specification" .
.Pp
If
.Nm nfsd
detects that
.Tn NFS
is not loaded in the running kernel, it will attempt
to load a loadable kernel module containing
.Tn NFS
support using
.Xr modload 8
by way of
.Xr vfsload 3 .
If this fails, or no
.Tn NFS
LKM is available,
.Nm nfsd
will exit with an error.
.Pp
The
.Nm nfsd
utility exits 0 on success, and >0 if an error occurs.
.Sh SEE ALSO
.Xr nfsstat 1 ,
.Xr nfssvc 2 ,
.Xr modload 8 ,
.Xr mountd 8 ,
.Xr portmap 8
.Sh HISTORY
The
.Nm nfsd
utility first appeared in 4.4BSD.
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