Linux

Question 1

What does “cd ~ “ do?

Answer 1

Change directory to “Home”

Question 2

What does the “history” command do?

Answer 2

Lists last 500 commands

Question 3

bsh

Answer 3

Bourne SHell; outdated

Question 4

bash

Answer 4

Bourne Again SHell; Updated bsh, most common default shell in Linux flavors

Question 5

cp vs dd

Answer 5

cp=copy

dd=copy at bit level

Question 6

rm

Answer 6

remove

Question 7

grep

Answer 7

Search lines for a specified string

grep [options] [pattern] [file]

Question 8

What does the /dev/zero file contain?

Answer 8

/dev/zero is a file with unlimited zeros.

Question 9

RegEx: grep ‘.at’

Answer 9

Cat, Hat, Rat, etc.

. = Any single character

Question 10

RegEx: grep ‘[CAT]at’

Answer 10

Cat, Aat, Tat

[ ] = Any specified character

Question 11

RegEx: grep ‘^at’

Answer 11

At, ate
Not: Cat, hat
^ = Only when the string is at the beginning of a line

Question 12

ifconfig vs iwconfig

Answer 12

iwconfig shows network configuration for wireless network interfaces only..

Question 13

What is the TTY of a process?

Answer 13

The name of the terminal the process is running in.

Question 14

What is a PID?

Answer 14

Process Identifier.

Question 15

ps command

Answer 15

Displays all processes running in the terminal

Question 16

ps -e

Answer 16

Displays all processes running on the host, rather than just the terminal.

Question 17

Define “pre-emptive multi-tasking”

Answer 17

When the computer rapidly switches between tasks the

CPU focuses on to give the appearance of multi-tasking

Question 18

Mail Transfer Agent (MTA)

Answer 18

Determines which server needs to receive the email to be able to forward it to the correct host and uses SMTP to move it there.

Question 19

Mail Delivery Agent (MDA)

Answer 19

Transfers the email to the user’s inbox.

Question 20

POP/IMAP Server

Answer 20

Allow the email client on your computer to receive an email from a remote server.

Question 21

What language is Linux written in?

Answer 21

C

Question 22

Compiled vs interpreted language

Answer 22

Interpreted: Translates written code into computer code as it runs
Compiled: Translated all at once

Question 23

Describe C Language

Answer 23

Compiled language. Designed to be small and efficient, due to it’s age and lack of processing power when it was created.

Question 24

Test

Answer 24

Test

Question 25

Describe Java

Answer 25

Compiled language. Images hypothetical CPU called Java Virtual Machine and compiles code to that.

Question 26

Describe Perl

Answer 26

Interpreted. Developed for text manipulation.

Question 27

Describe PHP

Answer 27

Developed to create dynamic web pages.

Question 28

Ruby

Answer 28

Influenced by Perl. Makes complicated programming tasks easier.

Question 29

What does FLOSS stand for?

Answer 29

Free/Libre/Open Source Software

Sometimes simply FOSS

Question 30

WHat is “gufw”?

Answer 30

the Graphical Uncomplicated FireWall that comes default with Linux.