Command line

Question 1

What is a CLI?

Answer 1

A command-line interface (CLI) processes commands to a computer program in the form of lines of text.

Question 2

What is GUI?

Answer 2

The graphical user interface (GUI /ˌdʒiːjuːˈaɪ/ JEE-yoo-EYE[1][Note 1] or /ˈɡuːi/[2] GOO-ee) is a form of user interface that allows users to interact with electronic devices through graphical icons and audio indicator such as primary notation, instead of text-based user interfaces, typed command labels or text navigation.

Question 3

man

Answer 3

opens the manual

Question 4

cat

Answer 4

prints the content of a file, and concatenate the files into one file.

cat laziness.txt impatience.txt hubris.txt > three-virtues.txt

Question 5

ls

Answer 5

To see the list of files or folders

• a all the files
• F

Question 6

pwd

Answer 6

1. path to Print working directory

2. add a new file to the current working directory

Question 7

echo

Answer 7

Add content to the file(could be new).

echo ‘Hello, World!’ > hello.txt

Question 8

touch

Question 9

What are the three virtues of a great programmer?

Answer 9

Laziness: The quality that makes you go to great effort to reduce overall energy expenditure. It makes you write labor-saving programs that other people will find useful and document what you wrote so you don’t have to answer so many questions about it.
Impatience: The anger you feel when the computer is being lazy. This makes you write programs that don’t just react to your needs, but actually anticipate them. Or at least pretend to.
Hubris: The quality that makes you write (and maintain) programs that other people won’t want to say bad things about.

Question 10

mv

Answer 10

Move or rename

Question 11

mkdir

Answer 11

creates new directory

Question 12

rm

Answer 12

removes file or directory

Question 13

cp

Answer 13

copy

Question 14

what are the three virtues of a programmer?

Answer 14

Laziness: The quality that makes you go to great effort to reduce overall energy expenditure. It makes you write labor-saving programs that other people will find useful and document what you wrote so you don’t have to answer so many questions about it.
Impatience: The anger you feel when the computer is being lazy. This makes you write programs that don’t just react to your needs, but actually anticipate them. Or at least pretend to.
Hubris: The quality that makes you write (and maintain) programs that other people won’t want to say bad things about.