Networking Guide
Chapter 13, Configuring the NFS automounter

The -null built-in map

The -null built-in map

The -null built-in map is always used in association with a mount point and tells automount not to mount any remote filesystems to this mount point on the local host. This excludes any mounts to the associated mount point that may be specified:

This map is typically used to prevent an NIS map from specifying a mount to a mount point that the local system does not want covered. Remember that a remote filesystem, when automounted, hides any existing files or directories under that mount point.

Here is an example of -null map usage on the automount command line:

automount /usr/bin -null

In this example, automount will ignore all instructions to mount remote filesystems to /usr/bin. See ``Using built-in automount maps'' for further examples of using the -null map.

See also: