Linux basics

Question 1

how do you list file system objects?

Answer 1

ls

Question 2

how do you print the current directory?

Answer 2

pwd

Question 3

how do you change directories?

Answer 3

cd

Question 4

how do you move files from one location to another?

Answer 4

mv

Question 5

how do you copy files from one location to another?

Answer 5

cp

Question 6

how do you delete files from the system?

Answer 6

rm

Question 7

how can you display the amount of free disk space?

Answer 7

df

Question 8

how can you estimate file space usage?

Answer 8

du

Question 9

what is nano?

Answer 9

an easy to use command line text editor

Question 10

what is the vi command?

Answer 10

an old command that supports modal editiing

Question 11

what is the vim command?

Answer 11

an updated version of vi. supports normal, visual, insert and command line mode.

Question 12

what is the pico command?

Answer 12

another text editor that provides less features and less complexity

Question 13

what is the cat command?

Answer 13

used to create, view or concatenate files

Question 14

what is the find command?

Answer 14

used to search the file system or directory.

Question 15

what is the grep command?

Answer 15

used to search for the characters within the specified file using regular expressions

Question 16

what does the su command do?

Answer 16

switch users

Question 17

what does the sudo command do?

Answer 17

used to switch to the root user, and runs commands with elevated privileges

Question 18

what is the useradd command for?

Answer 18

used to create a new user.

Question 19

what is the usermod command?

Answer 19

used to modify the users account

Question 20

what does the passwd command do?

Answer 20

used to change or reset the password of the users account.

Question 21

what is the groupadd command?

Answer 21

used to add a new group

Question 22

what is the groupmod command?

Answer 22

used to modify a group?

Question 23

what is the groupdel command?

Answer 23

used to delete a group

Question 24

what is the chmod command?

Answer 24

used to change the access permissions

Question 25

what is the chown command?

Answer 25

used to change the owner

Question 26

how can you install and remove software on Debian?

Answer 26

apt-get

Question 27

how do you install and remove software on a Red Hat distribution?

Answer 27

yum

Question 28

what is the dnf command?

Answer 28

updated version of the yum command

Question 29

what is a low level tool used to remove and install software on Red Hat?

Answer 29

rpm

Question 30

how can you display a list of currently running processes?

Answer 30

ps

Question 31

what is the top command?

Answer 31

task manager that is used to display information about CPU and memory.

Question 32

what is the ip command used for?

Answer 32

used for configuring network interfaces

Question 33

how do you test a hosts reachability on an IP based network?

Answer 33

ping

Question 34

what is traceroute?

Answer 34

used to display the route and transmit time across an IP based network

Question 35

how do you query the DNS to get information about the different DNS records?

Answer 35

dig

Question 36

how do you access and search online manuals?

Answer 36

man

Question 37

when is –help used?

Answer 37

written after the name of a command to give information on how to use a specific command.

Question 38

what is Samba?

Answer 38

cross platform file sharing protocol that supports the SMB