A backing store image (fancy term for an image used as a backup) of a file system at a given point in time.

A value that modifies the default permissions on a newly created file or directory, resulting in the file or directory's real permission structure.

The file system used for DVD-ROMs.

The standard hard disk-based file system used in Solaris (and most of the rest of the UNIX world).

To make a file system unavailable for use.

A number that uniquely identifies a user on the computer.

A character string that uniquely identifies a user on the computer. Users log in by using their username and a password.

A set of files run during the login process that configures the user's working environment.