Linux Commands

Question 1

List a directory’s content

Answer 1

ls

Question 2

Shows the current working directory’s path

Answer 2

pwd

Question 3

Changes the working directory

Answer 3

cd

Question 4

Creates a new directory

Answer 4

mkdir

Question 5

Deletes a file

Answer 5

rm

Question 6

Copies files and directories, including their content

Answer 6

cp

Question 7

Moves or renames files and directories

Answer 7

mv

Question 8

Creates a new empty file

Answer 8

touch

Question 9

Checks a file’s type

Answer 9

file

Question 10

Creates and extracts a ZIP archive

Answer 10

zip and unzip

Question 11

Archives files without compression in a TAR format

Answer 11

tar

Question 12

Edits a file with a text editor

Answer 12

nano, vi, and jed

Question 13

Lists, combines, and writes a file’s content as a standard output

Answer 13

cat

Question 14

Searches a string within a file

Answer 14

grep

Question 15

Finds, replaces, or deletes patterns in a file

Answer 15

sed

Question 16

Displays a file’s first ten lines

Answer 16

head

Question 17

Prints a file’s last ten lines

Answer 17

tail

Question 18

Finds and manipulates patterns in a file

Answer 18

awk

Question 19

Reorders a file’s content

Answer 19

sort

Question 20

Sections and prints lines from a file

Answer 20

cut

Question 21

Compares two files’ content and their differences

Answer 21

diff

Question 22

Prints command outputs in Terminal and a file

Answer 22

tee

Question 23

Finds files in a system’s database

Answer 23

locate

Question 24

Outputs a file or folder’s location

Answer 24

find

Question 25

Runs a command as a superuser

Answer 25

sudo

Question 26

Runs programs in the current shell as another user

Answer 26

su

Question 27

Modifies a file’s read, write, and execute permissions

Answer 27

chmod

Question 28

Changes a file, directory, or symbolic link’s ownership

Answer 28

chown

Question 29

Creates and removes a user account

Answer 29

useradd and userdel

Question 30

Displays the system’s overall disk space usage

Answer 30

df

Question 31

Checks a file or directory’s storage consumption

Answer 31

du

Question 32

Displays running processes and the system’s resource usage

Answer 32

top

Question 33

Works like top but with an interactive user interface

Answer 33

htop

Question 34

Creates a snapshot of all running processes

Answer 34

ps

Question 35

Prints information about your machine’s kernel, name, and hardware

Answer 35

uname

Question 36

Shows your system’s hostname

Answer 36

hostname

Question 37

Calculates commands’ execution time

Answer 37

time

Question 38

Manages system services

Answer 38

systemctl

Question 39

Runs another command continuously

Answer 39

watch

Question 40

Displays a shell’s running processes with their statuses

Answer 40

jobs

Question 41

Terminates a running process

Answer 41

kill

Question 42

Turns off or restarts the system

Answer 42

shutdown

Question 43

Checks the system’s network connectivity

Answer 43

ping

Question 44

Downloads files from a URL

Answer 44

wget

Question 45

Transmits data between servers using URLs

Answer 45

curl

Question 46

Securely copies files or directories to another system

Answer 46

scp

Question 47

Synchronizes content between directories or machines

Answer 47

rsync

Question 48

Displays the system’s network interfaces and their configurations

Answer 48

lfconfig

Question 49

Shows the system’s network information, like routing and sockets

Answer 49

netstat

Question 50

Tracks a packet’s hops to its destination

Answer 50

traceroute

Question 51

Queries a domain’s IP address and vice versa

Answer 51

nslookup

Question 52

Displays DNS information, including record types

Answer 52

dig

Question 53

Lists previously run commands

Answer 53

history

Question 54

Shows a command’s manual

Answer 54

man

Question 55

Prints a message as a standard output

Answer 55

echo

Question 56

Links files or directories

Answer 56

ln

Question 57

Sets and removes an alias for a file or command

Answer 57

alias and unalias

Question 58

Displays a calendar in Terminal

Answer 58

cal

Question 59

Manages Debian-based distros package libraries

Answer 59

apt-get