1.\" $OpenBSD: nfsd.8,v 1.19 2015/09/10 15:16:43 schwarze Exp $ 2.\" $NetBSD: nfsd.8,v 1.7 1996/02/18 11:58:24 fvdl Exp $ 3.\" 4.\" Copyright (c) 1989, 1991, 1993 5.\" The Regents of the University of California. All rights reserved. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 3. Neither the name of the University nor the names of its contributors 16.\" may be used to endorse or promote products derived from this software 17.\" without specific prior written permission. 18.\" 19.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29.\" SUCH DAMAGE. 30.\" 31.\" @(#)nfsd.8 8.4 (Berkeley) 3/29/95 32.\" 33.Dd $Mdocdate: September 10 2015 $ 34.Dt NFSD 8 35.Os 36.Sh NAME 37.Nm nfsd 38.Nd remote NFS server 39.Sh SYNOPSIS 40.Nm nfsd 41.Op Fl rtu 42.Op Fl n Ar num_servers 43.Sh DESCRIPTION 44.Nm 45runs on a server machine to service NFS 46requests from client machines. 47At least one 48.Nm 49must be running for a machine to operate as a server. 50.Pp 51Unless otherwise specified, four servers for UDP 52transport are started. 53.Pp 54The options are as follows: 55.Bl -tag -width Ds 56.It Fl n Ar num_servers 57Specifies how many servers to create (max 20). 58.It Fl r 59Register the NFS service with 60.Xr portmap 8 61without creating any servers. 62This option can be used along with the 63.Fl u 64or 65.Fl t 66options to re-register NFS if the portmap server is restarted. 67.It Fl t 68Serve TCP NFS clients. 69.It Fl u 70Serve UDP NFS clients. 71.El 72.Pp 73For example, 74.Dq Li "nfsd -u -t -n 6" 75serves UDP and TCP transports using six daemons. 76.Pp 77A server should run enough daemons to handle 78the maximum level of concurrency from its clients, 79typically four to six. 80.Pp 81.Nm 82listens for service requests at the port indicated in the NFS 83server specification; see RFCs 1094 and 1813. 84.Sh EXIT STATUS 85.Ex -std nfsd 86.Sh SEE ALSO 87.Xr nfsstat 1 , 88.Xr nfssvc 2 , 89.Xr mountd 8 , 90.Xr portmap 8 91.Sh HISTORY 92The 93.Nm 94utility first appeared in 95.Bx 4.4 . 96