Command Line Basics

Question 1

What are the three great virtues of a programmer?

Answer 1

1. 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.
2. 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.
3. Hubris: The quality that makes you write (and maintain) programs that other people won’t want to say bad things about.

Question 2

What is a GUI?

Answer 2

Graphical User Interface

Question 3

What is a CLI

Answer 3

Command Line Interface

Question 4

Terminal: cat

Answer 4

Concatenate and print (display) the content of files

Question 5

Terminal: ls

Answer 5

list directory

Question 6

Terminal: pwd

Answer 6

print working directory

Question 7

Terminal: echo

Answer 7

display a line of text

Question 8

Terminal: touch

Answer 8

Change file timestamps

the easiest way to create new, empty files. It is also used to change the timestamps (i.e., dates and times of the most recent access and modification) on existing files and directories.

Question 9

Terminal: mkdir

Answer 9

make directory

Question 10

Terminal: mv

Answer 10

move a file or directory

Question 11

Terminal: rm

Answer 11

remove file or directory

Question 12

Terminal: cp

Answer 12

copy a file or directory