Architecture

The above diagram shows the Linux architecture, let me explain u in the easiest way possible, let's say u install an application that's where the application layer comes then we write some commands to access it which can be Command Prompt(cmd) that command goes to Kernel as shell can't talk directly with hardware that's where the role of kernel takes place, and it talks to hardware, that's how the communication takes place.

Basics Of Linux

1. Check your present working directory

   Present Working Directory

    pwd
   

2. List all the files or directories including hidden files.

    ls -a
   

3. Create a nested directory A/B/C/D/E

    mkdir -p A/B/C/D/E