I am practicing this all below Commands to master Ubuntu & Start my Journey in DevOps

Let's Start

Terms related to OS

Windows vs Ubuntu
Folder -> Directory
Administrator-> Root
File -> File
Software -> Package

Basic Linux Commands

1) sudo su - Changing to Root user to get Administrative Privilages

2) pwd - present location of working directory

3) ls - to list all files & Directory

4) cd - change directory

5) cd .. - To Come out from Directory

6) clear - To clear the Output

File Creation Commands

1) touch - Create Empty file

2) cat - use to create file able to to write in terminal to exit press CONTROL+D

Directory Creation

1) mkdir - Create a folder