Intro to Linux & understanding Commands

Question 1

what is linux?

Answer 1

an open source operating system based on UNIX

Question 2

what is a the linux kernel?

Answer 2

it is a program that makes up the core of an operating system

Question 3

what does the kernel do?

Answer 3

Handles res of start-up process
handles input/output from other programs
manages memory & hardware peripherals(keyboards, mouses, monitors. speakers, printers etc)

Question 4

LS

Answer 4

Lists directory contents

Question 5

cd

Answer 5

Changes the current directory

Question 6

pwd

Answer 6

displays present, working directory

Question 7

cat

Answer 7

concatenates(omits) and displays files

Question 8

echo

Answer 8

displays arguments(line of text or variable value) to the screen

Question 9

man

Answer 9

Displays the online manual.

Question 10

exit

Answer 10

Exits the shell or your current session.

Question 11

Clear

Answer 11

clears the screen

Question 12

how to build a command

Answer 12

what to do&raquo_space;>how to do»>what to do it with

Command Options Arguments

Question 13

touch

Answer 13

Created an empty file(vi)

Question 14

id

Answer 14

Prints real and effective user and group[s ids.

Question 15

who

Answer 15

shows who is logged on

Question 16

uname

Answer 16

Prints system information

Question 17

whoami

Answer 17

Prints effective user id

Question 18

how to create a file without contents?

Answer 18

$touchfile1

Question 19

how to create several files(vi) at once?

Answer 19

$touchfile1 file2 file3

Question 20

How to create directories?

Answer 20

$mkdir directory1
$mkdir linuxforjob
$mkdir linux for jobs

Question 21

$cd..

Answer 21

Move up on level

Question 22

$cd~

Answer 22

move back to home dir