Unix Command Line

Question 1

What analogy can we use to understand your operating system?

Answer 1

The operating systems is like a pistachio nut. the kernel refers to the actual program that interfaces with the hardware. It’s the core of your operating system.

The shell in computing refers to the user interface that allows us to interact with kernel.

Question 2

What are the two variations of the program that interfaces with the hardware (shell)?

Answer 2

Graphical user interface (G.U.I.) and the command line interface (C.L.I.)

Question 3

What does BASH stand for and what is it?

Answer 3

BASH stands for Bourne Again Shell and is a CLI or a command line interpreter for the Unix system.

Question 4

Why should we use Command Line?

Answer 4

Two major reasons to use the command line are:
1. Makes things easier and faster. Example: Creating a new file in one short line of code compared to looking through files in the user interface.
2. You have more control and flexibility. Example: Creating secret files.

Question 5

What is LS when using the command line?

Answer 5

LS stands for list and it is a command that lists all the items inside a particular directory.

Question 6

What is the root or the highest level in your directory? (mac)

Answer 6

Your macintosh hard drive.

Question 7

What does the tilde show in the command line?

Answer 7

The tilde shows you where you are in the directory.

Question 8

What is the CD command?

Answer 8

CD stands for change directory and it allows us to navigate to a specific folder . We simply have to type cd and then the folder name. We can do this going through folders one by one or we can specify the entire path to get there.

Example:
cd Documents/Learn/Languages

Question 9

How do we get back to our root in command line?

Answer 9

We type cd (change directory) and the tilde symbol.

Question 10

How can we use the last command that we typed?

Answer 10

We hit the up button.