Shell (2)

Unix-like systems such as Linux always have a single file system tree, regardless

How many drives or storage devices are attached to the computer. Storage Devices

Are attached (mounted) at various points on the tree according to the system administrator.

 

Absolute pathnames

An absolute pathname begins with the root directory and follows the tree branch by branch

Until the path to the desired directory or file is completed.

 

Relative pathnames

A relative pathname starts from the working directory.

The "." symbol refers to the working directory and "the" sysmbol

Refers to the working directory's parent directory.

Actually, you can omit "./".

 

Linux has no concept of a "file extension" like some other operating systems.