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Commands Reference, Volume 3

mountd Daemon


Answers requests from clients for file system mounts.


/usr/sbin/rpc.mountd [ -n ] [ -N ]


The mountd daemon is a Remote Procedure Call (RPC) that answers a client request to mount a file system. The mountd daemon finds out which file systems are available by reading the /etc/xtab file.

In addition, the mountd daemon provides a list of currently mounted file systems and the clients on which they are mounted. You can display this list by using the showmount command.


The mountd daemon is started from the /etc/rc.nfs file. The mountd daemon can be started and stopped by the following System Resource Controller (SRC) commands:

startsrc -s rpc.mountd
stopsrc -s rpc.mountd

To change the parameters passed to the mountd daemon, use the chssys command. For example:

chssys -s rpc.mountd -a Argument

The change will not take effect until the daemon is restarted.


-n Allows clients that use older versions of NFS to mount file systems. This option makes the system less secure. It is the default for AIX 4.2 through 5.1.
-N Deny mount requests originating from non-privileged ports. This is the opposite of using the '-n' flag, and is the default for AIX 5.2 and higher.


/etc/exports Lists the directories that the server can export.
/etc/inetd.conf Defines how the inetd daemon handles Internet service requests.
/etc/xtab Lists currently exported directories.

Related Information

The chssys command, mount command, showmount command.

The nfsd daemon, portmap daemon.

Network File System (NFS) Overview for System Management in AIX 5L Version 5.2 System Management Guide: Communications and Networks.

System Resource Controller Overview in AIX 5L Version 5.2 System Management Concepts: Operating System and Devices.

How to Mount a NFS File System Explicitly and How to Mount a File System Using Secure NFS in AIX 5L Version 5.2 Security Guide.

List of NFS Commands.

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