Commands

Question 1

What Command is used to check the Kernel version

Answer 1

Uname -R

Question 2

Is

Answer 2

list all the files that your current folder contains

Question 3

man

Answer 3

display user manuals of any command that you run

Question 4

Cd

Answer 4

Navigate and change you’re working directory

Question 5

Pwd

Answer 5

Display the path of your working directory

Question 6

Mkdir

Answer 6

Create or make new directories

Question 7

Rmdir

Answer 7

Remove already e empty directories

Question 8

Mv

Answer 8

Move or rename files or directories

Question 9

Open

Answer 9

Open files, directories and applications

Question 10

Echo

Answer 10

Display lines of text or string which are passed as arguments

Question 11

Touch

Answer 11

Create empty files, And change timestamps of files or folders

Question 12

Find

Answer 12

Find files and directories And perform operations on them

Question 13

Clear

Answer 13

Clear your terminal screen

Question 14

History

Answer 14

View your previously executed commands

Question 15

tail

Answer 15

Display the last few numbers of lines (no lines by default) of a file

Question 16

head

Answer 16

Display the first few numbers of lines (no lines by default) of a file

Question 17

Whoami

Answer 17

Display the currently logged in-user

Question 18

Who

Answer 18

Display information about users who are currently logged in

Question 19

Cat

Answer 19

Create single or multiple files, view content of a file, concatenate files and redirect output in the terminal or to other files

Question 20

less

Answer 20

Read the contents of a text file one page (one screen) at a time

Question 21

Wc

Answer 21

Display number of lines, Word count, byte and character count in files

Question 22

grep

Answer 22

Search for a string of characters in a specified file

Question 23

Sort

Answer 23

Sort a file, arranging its output in a particular order

Question 24

Apropos

Answer 24

Shows the manual section(s) That contain a set of key words

Question 25

In

Answer 25

Create links to files or directories

Question 26

Alias

Answer 26

create a shortcut name for a Command, file name, or any shell text

Question 27

ID

Answer 27

Display the user and group names, and numeric ID’s

Question 28

Last

Answer 28

Display the list of all the users who logged in and logged out since the file /var/log/wtmp was created

Question 29

Su

Answer 29

Execute commands with the privileges of another account

Question 30

Sudo

Answer 30

Temporarily elevate current user account to have root privileges

Question 31

export

Answer 31

Ensures environment variables and functions to be passed to child processes

Question 32

Uname

Answer 32

Check the system information of your Linux system

Question 33

Env

Answer 33

display environment variables. Also used to run a utility or commands in a custom environment

Question 34

Printenv

Answer 34

display the values of environment variables in the current shell

Question 35

Chown

Answer 35

Change the files owner or group

Question 36

Chmod

Answer 36

Change the access permissions of files and directories

Question 37

Useradd

Answer 37

Add a user account to your system

Question 38

Usermod

Answer 38

Modify existing user account details, such as username, password etc.

Question 38

Usermod

Answer 38

Modify existing user account details, such as username, password etc.

Question 39

Groupadd

Answer 39

Add a group to your system

Question 40

Groupmod

Answer 40

Modify or change an existing group on your system

Question 41

Passwd

Answer 41

Changes password for user account

Question 42

Unmask

Answer 42

Set up default permissions for newly created files and folders

Question 43

Df

Answer 43

Display the amount of disk space available on the file system

Question 44

Free

Answer 44

output summary of RAM usage, including total, used, free, shared, and available memory and swap space.

Question 45

Ps

Answer 45

check the status of active processes on a system, as well as display technical information about the processes

Question 46

Top

Answer 46

monitor system/display system-performance information

Question 47

Uptime

Answer 47

display how long your system has been active (running)

Question 48

Vim

Answer 48

a text editor that is an upgraded version of its predecessor, Vi editor

Question 49

Gzip

Answer 49

seamlessly compress and decompress files

Question 50

Gunzip

Answer 50

compress or expand a file or a list of files

Question 51

Zip

Answer 51

put one or more compressed files into a single zip archive

Question 52

tar

Answer 52

compress a group of files into an archive for backup or distribution

Question 53

Ping

Answer 53

Check the connectivity between host and server/host

Question 54

Dig

Answer 54

retrieve information about DNS name servers

Question 55

traceroute

Answer 55

display the route that a packet takes to reach the host

Question 56

route

Answer 56

access and modify the Linux kernel's routing tables

Question 57

crontab

Answer 57

submit, edit, list, or remove cron jobs