Linux Introduction

hello friends in this tutorial we are

going to learn about linux shell

scripting this tutorial is for all the

people who wants to learn Linux from the

basics as well as it covers the advanced

concepts of your shell scripting so here

before we begin with this shell

scripting I would like to introduce the

Linux operating system first as we know

you have multiple operating systems into

the market you might have heard about

the Windows operating systems Linux and

Mac operating systems same here the

green X operating system is all together

have different distributor and it works

completely different from the other

operating systems so basically first we

will understand what the Linux operating

system is and how it works so very first

we will see about this kernel version of

your operating system as we know if I am

talking about any operating system

either your Windows Mac or Linux it has

two different parts in two it means two

different code of programs one has a

kernel and other act as a shell where

the shell we are going to see later on

but basically I am going to make you

understand what the kernel is so kernel

is a part of a program or a program and

built into the operating system so that

whatever the commands a user give or

whatever the command Co give

it generally takes those commands and

make our hardware's to work on it so

basically kernel is that particular

person who act as an intermediate

between the user commands and the

hardware's so next what we are going to

see is like your kernel as it is doing

everything but unlike your other

operating systems like your Windows and

Mac it has a multiple distribution you

might have heard about the Linux

operating system provided by Red Hat

Fedora sent to us and many more because

the operating system itself is an open

source operating system which means you

can see each and every coded into this

particular operating system and how it

is formed if you want to modify this

particular operating system you can

modify the codes you can add some more

programs and rebuild a new operating

system and published by your own that's

the reason the

distribution of this operating system is

free for everyone no one is going to

restrict you and this particular

operating system is a hiring no

copyright issues here this operating

system Linux is introduced by a Linux

toe wall liner stalwart is a student

actually he actually invented this

particular complete Linux operating

system during his studies so he was

working on a project on a UNIX operating

system so during the Linux operating

system project he learned UNIX very well

and he find out some of the changes can

be made in the Linux kernel and can

create a new version of your kernel so

when he introduced a new version of the

kernel that was introduced by his name

but here we have introduced it as a

Linux operating system so this operating

system as I told liked here UNIX has

been completely built on open source

operating system its codes are

completely open source here again the

Linux operating system is open source

for everyone so as discussed into the

earlier slide that all these particular

operating systems are open and they are

free so here we do not have any

licensing issue like your Microsoft and

other operating systems we can get this

operating system free of course we can

download it we can install this

operating system without a particular

license and there is no such issues like

of licensing without license you won't

be able to use any particular features

of this operating system or you have

limitation so there is no such thing so

this operating system is completely free

for you as said this is open source you

can also study the Linux operating

system completely you can dig into the

all the particular programs you have for

your interfaces for your applications

for your protocols and you can learn

this operating system very easily the

next thing is that most of the

applications and those operating system

is free for you

same again unlike your other operating

system as you go for applying a Windows

operating system into that if you

install Microsoft Office or if you want

to install a small software called as

WinZip when you need to buy a license

for it but here if you see all the

particular

applications like your OpenOffice for

your playing your media players and any

other particular applications you

require that will be completely free for

you so here all the applications are

free again one of the benefit what we

have is this servers are very reliable

again unlike your other operating

systems most of the services works

independently so there is no collision

occurs into any of the particular

applications or the services so

independently they will work and the

servers are mostly stable so the

downtime what we have into this

particular operating systems is very

less than the other operating systems

that's the reason we fly to use this

Linux operating system for building our

servers or a development servers or any

particular databases server so that we

have a zero downtime or a very very out

downtime as we have seen this completely

next operating system is based on UNIX

operating system so what are the

commands you generally use on your

earlier version of your UNIX operating

system same command you can use it as we

can say it as a clone of Unix with some

advanced features so this is benefits of

your Linux operating system so

ultimately in your future you will find

most of the servers are all built on the

Linux operating systems and the

scripting into it is very powerful so we

are going to learn everything into the

next sessions