NFS is a distributed file system service that can be used to share resources (files or directories) from one system, typically a server, with other systems across the network. For example, you might want to share third-party applications or source files with users on other systems.
NFS makes the actual physical location of the resource irrelevant to the user. Instead of placing copies of commonly used files on every system, NFS allows you to place one copy on one system's disk and let all other systems access it across the network. Under NFS, remote files are virtually indistinguishable from local ones.
When you share a resource, you make it available for mounting by remote systems.
You can share a resource in these ways:
By adding an entry to the /etc/dfs/dfstab (distributed file system table) file and rebooting the system
See Chapter 36, Mounting and Unmounting File Systems (Tasks) for information on how to share resources. See System Administration Guide, Volume 3 for a complete description of NFS.