Hour 3. Working with Files
In UNIX there are two basic types of files: ordinary and special. An ordinary file contains data, text, or program instructions. Almost all of the files on a UNIX system are ordinary files. This chapter covers operations on ordinary files.
Special files are mainly used to provide access to hardware such as hard drives, CD-ROM drives, modems, and Ethernet adapters. Some special files are similar to aliases or shortcuts and enable you to access a single file using different names. Special files are covered in Chapter 6, “Manipulating File Attributes.”