NFSD(8) Maintenance Commands and Procedures NFSD(8)

NFS daemon

/usr/lib/nfs/nfsd [-a] [-c max_conn] [-l listen_backlog] [-p protocol] [-t device] [nservers]

nfsd is the daemon that handles client file system requests. Only users with {PRIV_SYS_NFS} and sufficient privileges to write to /var/run can run this daemon.

The nfsd daemon is automatically invoked using share(8) with the -a option.

By default, nfsd starts over the TCP and UDP transports for versions 2 and 3. By default, it starts over the TCP for version 4. You can change this with the -p option.

A previously invoked nfsd daemon started with or without options must be stopped before invoking another nfsd command.

See nfs(5) for available configuration properties for nfsd.

The following options are supported:
Start a NFS daemon over all available connectionless and connection-oriented transports, including UDP and TCP. Equivalent of setting the protocol property to all.
Set the maximum number of connections allowed to the NFS server over connection-oriented transports. By default, the number of connections is unlimited. Equivalent of the max_connections property.
Set connection queue length for the NFS server over a connection-oriented transport. The default value is 32 entries. Equivalent of the listen_backlog property.
Start a NFS daemon over the specified protocol. Equivalent of the protocol property.
Start a NFS daemon for the transport specified by the given device. Equivalent of the device property.

The following operands are supported:
This sets the maximum number of concurrent NFS requests that the server can handle. This concurrency is achieved by up to nservers threads created as needed in the kernel. nservers should be based on the load expected on this server. 16 is the usual number of nservers. If nservers is not specified, the maximum number of concurrent NFS requests will default to 1. Equivalent of the servers property.

If the nfs_portmon variable is set to non-zero value in /etc/system, then clients are required to use privileged ports (ports < IPPORT_RESERVED) to get NFS services. This variable is equal to zero by default. This variable has been moved from the “nfs” module to the “nfssrv” module. To set the variable, edit the /etc/system file and add this entry:
set nfssrv:nfs_portmon = 1

Client machine pointer to an open-but-unlinked file.
System configuration information file.
Directories used by the server to manage client state information. These directories should not be removed.

Daemon started successfully.
Daemon failed to start.

svcs(1), nfs(5), sharetab(5), system(5), attributes(7), smf(7), zones(7), mountd(8), share(8), sharectl(8), sharemgr(8), svcadm(8)

Manually starting and restarting nfsd is not recommended. If it is necessary to do so, use svcadm to enable or disable the nfs service (svc:/network/nfs/server). If it is disabled, it will be enabled by share_nfs(8), unless its application/auto_enable property is set to false. See smf(7) and svcadm(8) for more information.

The nfsd service is managed by the service management facility, smf(7), under the service identifier:


Administrative actions on this service, such as enabling, disabling, or requesting restart, can be performed using svcadm(8). The service's status can be queried using the svcs(1) command.

If nfsd is killed with SIGTERM, it will not be restarted by the service management facility. Instead, nfsd can be restarted by other signals, such as SIGINT.

NFS service, which includes nfsd, can run inside a non-global zone. See the discussion under ZONES in nfs(5) for more information.

February 4, 2020 OmniOS