1.\" $NetBSD: nfsd.8,v 1.24 2016/03/17 15:25:46 christos Exp $ 2.\" 3.\" Copyright (c) 1989, 1991, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" @(#)nfsd.8 8.4 (Berkeley) 3/29/95 31.\" 32.Dd March 17, 2016 33.Dt NFSD 8 34.Os 35.Sh NAME 36.Nm nfsd 37.Nd remote 38.Tn NFS 39server 40.Sh SYNOPSIS 41.Nm 42.Op Fl 46drut 43.Op Fl n Ar num_threads 44.Sh DESCRIPTION 45.Nm 46runs on a server machine to service 47.Tn NFS 48requests from client machines. 49At least one 50.Nm 51must be running for a machine to operate as a server. 52.Pp 53Unless otherwise specified, four servers for 54.Tn UDP 55transport are started. 56.Pp 57The following options are available: 58.Bl -tag -width Ds 59.It Fl d 60Turn on debugging, don't fork and log to stderr. 61.It Fl r 62Register the 63.Tn NFS 64service with 65.Xr rpcbind 8 66without creating any servers. 67This option can be used along with the 68.Fl u 69or 70.Fl t 71options to re-register NFS if the portmap server is restarted. 72.It Fl n 73Specifies how many server threads to create. 74The default is 4. 75A server should run enough threads to handle 76the maximum level of concurrency from its clients. 77.It Fl 4 78Only listen to IPv4 requests. 79By default 80.Nm 81listens to both IPv6 and IPv4 and tries to register for both. 82.It Fl 6 83Only listen to IPv6 requests. 84.It Fl t 85Serve only 86.Tn TCP NFS 87clients. 88By default 89.Nm 90serves both 91.Tn TCP NFS 92and 93.Tn UDP NFS 94clients 95.It Fl u 96Serve only 97.Tn UDP NFS 98clients. 99.El 100.Pp 101.Nm 102listens for service requests at the port indicated in the 103.Tn NFS 104server specification; see 105.%T "Network File System Protocol Specification" , 106RFC 1094 and 107.%T "NFS: Network File System Version 3 Protocol Specification" . 108.Sh EXIT STATUS 109.Ex -std nfsd 110.Sh EXAMPLES 111.Dq Li "nfsd -n 6" 112serves 113.Tn UDP 114and 115.Tn TCP 116transports using six threads. 117.Sh SEE ALSO 118.Xr nfsstat 1 , 119.Xr nfssvc 2 , 120.Xr mountd 8 , 121.Xr rpcbind 8 122.Sh HISTORY 123The 124.Nm 125utility first appeared in 126.Bx 4.4 . 127