Basic Linux Commands

Question 1

Which command list directory contents?

Answer 1

ls

Question 2

What is cd command for?

Answer 2

Changes the current directory

Question 3

Which command displays the present working directory?

Answer 3

pwd

Question 4

What is cat command for?

Answer 4

Concatenates and displays file contents

Question 5

Which command displays arguments to the screen?

Answer 5

echo

Question 6

What is man command for?

Answer 6

For displaying the documentation of a command

Question 7

Which command clears the content shown in the shell?

Answer 7

clear

Question 8

How do we navigate when using the man command?

Answer 8

Enter -> Move down one line
Space -> Move down one page
g -> Move to the top of the page
G -> Move to the bottom of the page
q -> Quit

Question 9

Which command is use to locate where another command resides?

Answer 9

which / whereis

Question 10

How can we see the content of an environment variable?

Answer 10

echo $ENV_NAME /

Question 11

Which command is use to create a directory?

Answer 11

mkdir

Question 12

Which command is use to remove a directory?

Answer 12

rmdir

Question 13

What is the touch command for?

Answer 13

creating files or changing the modification date of existing ones.

Question 14

How can we create files with cat?

Answer 14

cat > filename (you write something or just CTRL+C, and the file is created)

Question 15

How can we see hidden files with ls?

Answer 15

ls -l or ll which is a common alias in Linux systems