9. Networking in Linux

Question 1

What is the command to have the hostname of the linux computer?

Answer 1

hostname

Question 2

What is the command to have the private ip address of the linux computer?

Answer 2

hostname -i

Question 3

What are the commands to have the information about the network interface the computer have?

Answer 3

ip address or ifconfig

Question 4

What is the ip address with the command ip address (with private range) with network mask?

Answer 4

inet

Question 5

What is the MAC address with the command ip address ?

Answer 5

link/ether

Question 6

What is the command to have the default routing table for the computer?

Answer 6

ip route

Question 7

What are the commands to verify connectivity with a remote server?

Answer 7

ping or traceroute

Question 8

What is the command to perform dns lookup?

Answer 8

nslookup

Question 9

What is the command to get information of the owner of a specific domain?

Answer 9

whois

Question 10

What is the purpose of ssh?

Answer 10

To connect remotly to another computer.

Question 11

What is the protocol used by ssh?

Answer 11

TCP

Question 12

What is the port used by ssh?

Answer 12

22

Question 13

What is the name of the package of ssh server?

Answer 13

openssh-server

Question 14

What is the command to check if the ssh server is running or not?

Answer 14

service ssh status

Question 15

What is the command to start the ssh server?

Answer 15

service ssh start

Question 16

Can I create a ssh connection via root user by default? (Yes or no)

Answer 16

No.

Question 17

What is the command to connect to a ssh server with bash or powershell?

Answer 17

ssh -p [port] username@domainname

Question 18

What is the command to get the content of a webpage from a website?

Answer 18

curl

Question 19

What is the command to download files from internet?

Answer 19

wget

Question 20

What is the color of png file on ubuntu?

Answer 20

purple