11.3.3 Unmounting a
Mounted File System
In this section, the key NFS files, commands, and
daemons are defined.
The following is a list of key NFS files.
-
/etc/bootparams
- Lists servers that diskless clients can use for
booting.
-
/etc/exports
- Lists the directories that can be exported to NFS
clients.
-
/etc/networks
- Contains information about networks on the Internet
network.
-
/etc/pcnfsd.conf Configuration File
- Options for the rpc.pcnfsd daemon.
-
/etc/rpc
- Contains database information for Remote Procedure
Call (RPC) programs.
-
/etc/xtab
- Lists directories that are currently exported.
-
/etc/filesystems
- Lists all file systems that can potentially be
mounted and their mounting configuration.
The following is a list of NFS Commands.
-
chnfs
- Starts a specified number of biod and nfsd daemons.
-
mknfs
- Configures the system to run NFS and starts NFS
daemons.
-
nfso
- Configures NFS network options.
-
automount
- Mounts an NFS automatically.
-
chnfsexp
- Changes the attributes of an NFS-exported directory.
-
chnfsmnt
- Changes the attributes of an NFS-mounted directory.
-
exportfs
- Exports and unexports directories to NFS clients.
-
lsnfsexp
- Displays the characteristics of directories that are
exported with NFS.
-
lsnfsmnt
- Displays the characteristics of mounted NFS systems.
-
mknfsexp
- Exports a directory using NFS.
-
mknfsmnt
- Mounts a directory using NFS.
-
rmnfs
- Changes the configuration to stop the NFS daemons.
-
rmnfsexp
- Removes NFS-exported directories from a server's list
of exports.
-
rmnfsmnt
- Removes NFS-mounted file systems from a client's list
of mounts.
The following is a list of NFS Locking daemons.
-
/usr/sbin/rpc.lockd
- Processes lock requests through the RPC package.
-
/usr/sbin/rpc.statd
- Provides crash-and-recovery functions for the locking
services on NFS.
The following is a list of NFS Network Service daemons and utilities.
-
/usr/sbin/biod
- Sends the client's read and write requests to the
server. The biod daemon is SRC controlled.
-
/usr/sbin/rpc.mountd
- Answers requests from clients for file system mounts.
The mountd daemon is SRC controlled.
-
/usr/sbin/nfsd
- Starts the daemons that handle a client's request for
file system operations. nfsd is SRC controlled.
-
/usr/sbin/nfsstat
- Displays information about a machine's ability to
receive calls.
-
/usr/bin/on
- Executes commands on remote machines.
-
/usr/sbin/portmap
- Maps RPC program numbers to Internet port numbers.
portmap is inetd Controlled.
-
/usr/sbin/rpc.rexd
- Accepts request to run programs from remote machines.
-
/usr/bin/rpcgen
- Generates C code to implement an RPC protocol.
-
/usr/bin/rpcinfo
- Reports the status of RPC servers.
-
/usr/sbin/rpc.rstatd
- Returns performance statistics obtained from the
kernel.
-
/usr/bin/rup
- Shows the status of a remote host on the local
network.
-
/usr/bin/rusers
- Reports a list of users logged on to the remote
machines.
-
/usr/lib/netsvc/rusers/rpc.rusersd
- Responds to queries from the rusers command.
-
/usr/sbin/rwall
- Sends messages to all users on the network on the
remote network.
-
/usr/lib/netsvc/rwall/rpc.rwalld
- Handles requests from the rwall command.
-
/usr/bin/showmount
- Displays a list of all clients that have mounted
remote file systems.
-
/usr/sbin/spray
- Sends a specified number of packets to a host.
-
/usr/sbin/rpc.pcnfsd
- Handles service requests from PC-NFS clients.
-
/usr/lib/netsvc/spray/rpc.sprayd
- Receives packets sent by the spray command.
11.5 NFS Problem
Determination