Files on this type of workstation are organized in UNIX file systems (UFS). A UNIX file system is a hierarchical tree structure consisting of files and directories. The origin of this hierarchy is the root directory whose path name is the slash (/). From here the directory structure proceeds downwards. Each directory subordinated to the root directory can have subdirectories or files of its own. Files constitute the lowest level of this hierarchy. From a file no further branch is possible.
Directories are also referred to as the nodes of a file system; they contain the names of files and subdirectories subordinated to them. The names of the files and directories are user-defined but have to comply with certain conventions.
For further information about the UNIX file system please refer to the “NFS” manual [11].
