Commands & Directories

Question 1

ls

Answer 1

Lists directory contents

Question 2

cd

Answer 2

Changes the directory

Question 3

cd ..

Answer 3

Returns to previous directory

Question 4

whoami

Answer 4

Displays current username

Question 5

pwd

Answer 5

Returns working directory name

Question 6

cat

Answer 6

Concatenate and print files

Question 7

sudo

Answer 7

Execute command as a different user

Question 8

clear or ctrl+l

Answer 8

Clears the terminal

Question 9

cp

Answer 9

Copy files or directories

Question 10

which

Answer 10

Returns the path to a file or link

Question 11

rm

Answer 11

Remove file

Question 12

adduser

Answer 12

add new user

Question 13

mkdir

Answer 13

Creates a directory

Question 14

/ (FSH)

Answer 14

Top-level directory “root filesystem”

Question 15

/bin

Answer 15

Contains essential command binaries

Question 16

/boot

Answer 16

Static bootloader, kernel & files required to boot the OS

Question 17

/dev

Answer 17

Contains device files

Question 18

/etc

Answer 18

Local system configuration files

Question 19

/home

Answer 19

Each user has a subdirectory here

Question 20

/lib

Answer 20

Shared library files required for boot

Question 21

/media

Answer 21

External removable media devices (Ex. USB drives) are mounted here

Question 22

/mnt

Answer 22

Temporary mount point for regular filesystems

Question 23

/opt

Answer 23

Optional files (Ex. third-party tools) can be saved here

Question 24

/root

Answer 24

Home directory for root user

Question 25

/sbin

Answer 25

Contains executables used for system administration (binary system files)

Question 26

/tmp

Answer 26

Directory to store temporary files and is generally cleared upon system boot or deleted at other times w/o warning

Question 27

/usr

Answer 27

Contains executables, libraries, man files, etc.

Question 28

/var

Answer 28

Contains variable data files such as log files, email in-boxes, web application related files, cron files, and more