Basic Linux Commands

Question 1

Used for searching “text” in files

Answer 1

grep

Question 2

Changes the current directory

Answer 2

cd

Question 3

Changes file permissions

Answer 3

chmod

Question 4

Changes the file owner and group

Answer 4

chown

Question 5

Copies files

Answer 5

cp

Question 6

Displays the contents of a directory

Answer 6

ls

Question 7

Creates a directory

Answer 7

mkdir

Question 8

Renames a file and moves the file from one directory to another

Answer 8

mv

Question 9

Delete files

Answer 9

rm

Question 10

Displays the current directory

Answer 10

pwd

Question 11

Copies blocks of data from one file to another. Used to copy data from devices

Answer 11

dd

Question 12

Searches for regular expressions in a text file

Answer 12

grep

Question 13

Download files from a repository site

Answer 13

apt-get

Question 14

Shuts down Linux

Answer 14

shutdown

Question 15

Starts the visual file editor, which can be used to edit files

Answer 15

vi

Question 16

Changes the password

Answer 16

passwd

Question 17

Starts a new shell as another user

Answer 17

su (root directory if not used with any other argument)

Question 18

Runs a command as another user (usually the root user)

Answer 18

sudu

Question 19

Allows you to display and configure info related to the network interface card (NIC)

Answer 19

ifconfig

Question 20

Same as ifconfig, except used for wireless

Answer 20

iwconfig

Question 21

Quit command

Answer 21

q

Question 22

Displays a list of the current running processes

Answer 22

ps

Question 23

Terminates a process

Answer 23

kill

Question 24

Command to change to root (superuser) in order to administer a system

Answer 24

su -