Introduction to Linux (Navigating the file system)

Question 1

How to print working directory (CLI)

Answer 1

pwd

Question 2

How to list all files (incl hidden files) (CLI)

Answer 2

ls -la

Question 3

how to get explanation and combinations of a command (CLI)

Answer 3

man ls (or any other command following man (manual) )

Question 4

how to print something to the screen/write to a file? (CLI)

Answer 4

with the echo command (use > to write to a file)

Question 5

how to print file content to screen (CLI)

Answer 5

with the cat command

Question 6

What to do if you can’t locate an existing file? (CLI)

Answer 6

update db with updatedb command

Question 7

How to change current password? (CLI)

Answer 7

passwd

Question 8

how to change user permissions of a file? (CLI)

Answer 8

chmod + rwx hello.txt OR chmod 777 hello.txt

Question 9

What does chmod 0 do to file permissions? (CLI)

Answer 9

— permission

Question 10

What does chmod 1 do to file permissions? (CLI)

Answer 10

–x permission

Question 11

What does chmod 2 do to file permissions? (CLI)

Answer 11

-w- permission

Question 12

What does chmod 3 do to file permissions? (CLI)

Answer 12

-wx permission

Question 13

What does chmod 4 do to file permissions? (CLI)

Answer 13

r– permission

Question 14

What does chmod 5 do to file permissions? (CLI)

Answer 14

r-x permission

Question 15

What does chmod 6 do to file permissions? (CLI)

Answer 15

rw- permission

Question 16

What does chmod 7 do to file permissions? (CLI)

Answer 16

rwx permission

Question 17

How to change to other user? (CLI)

Answer 17

su john

Question 18

How to add a user? (CLI)

Answer 18

sudo adduser john

Question 19

How to pull specific string/element out of a file?

Answer 19

grep

Question 20

How to see what commands you can run

Answer 20

sudo -l