All data in UNIX is organized into files. All files are organized into directories. These directories are organized into a tree-like structure called the filesystem.
Basically Unix consists of three Types of Files :
- Ordinary Files.
- Directories.
- Special Files.
Ordinary Files: An ordinary file is a file on the system that contains data, text, or program instructions.
Directories: Directories store both special and ordinary files. For users familiar with Windows or Mac OS, UNIX directories are equivalent to folders.
Special Files: Some special files provide access to hardware such as hard drives, CD-ROM drives, modems, and Ethernet adapters. Other special files are similar to aliases or shortcuts and enable you to access a single file using different names.
Below command used to list the files and directories stored in the current directory
Syntax : ls [flag] [string or filename]
Example : ls
Lists all the files in the Current directory.