Before the development of Graphical User Interface (in short GUI), the only way to interact with our Operating System was using the command line interface which takes in the text input to perform operating systems tasks and give textual output. CLI is still used by software developers and system administrators to install new software or manage operating system and use features which are not available in GUI.

On top of that, it helps increase productivity as everything is available in one window and we don't have to keep switching between windows or use a mouse to navigate. Despite the steep learning curve, it is worth learning CLI even if you have the option to get away without learning it.

For programmers learning CLI is necessary as it helps in editing, compiling, or building code faster and helps in setting critical parameters which might not be available in GUI.

These Topics will be covered in this session:

1. What is Linux

2. Terminal

3. Navigation commands

4. Task management

5. Desktop environments briefly

6. WSL/VMM briefly

7. Installation