Welcome to Learn Some Basic Linux Commands :
Check your present working directory.
The answer is "pwd" - Now lets see how we run it on an ubuntu machine :
List all the files or directories including hidden files.
The answer is "ls -a" - Now lets see how we run it on an ubuntu machine :
Create a nested directory A/B/C/D/E
The answer is "mkdir -p A/B/C/D/E" - Now lets see how we run it on an ubuntu machine :
Displays the directory structure of a path or of the disk in a drive graphically.
We can get this information from the command "tree" although we need to install it before as it doesn't come as preinstalled on ubuntu machine. We can run the command "sudo apt-get install tree" . Below is a pictorial representation when we run tree command.