What is Linux
UNIX like Operating System
Has the X Windows GUI
Runs on multiple hardware
Source Code is available
History of Linux
In 80’s, Microsoft’s DOS was the dominant
OS for PC
Apple MAC was better, but expensive
UNIX was much better, but much, much
more expensive. Only for minicomputer for
People were looking for a UNIX based
system, which is cheaper and can run on PC
History of Linux
Both DOS, MAC and UNIX were proprietary, i.e.,
the source code of their
kernel is protected
No modification is possible without paying high
A famous professor Andrew Tanenbaum developed
Minix, a simplified version of UNIX that runs on PC
–Minix is for class teaching only. No intention for
History of Linux
In Sept 1991, Linus Torvalds, a second year
student of Computer Science at the University of
Helsinki, developed the preliminary kernel of
Linux, known as Linux version 0.0.1
Linux has been used for many computing
platforms like PC, PDA, Supercomputers, ...
Not only character interface but also user
interface is available
The Oak Ridge National Laboratory's Jaguar
supercomputer, as of November 2009 the
world's fastest supercomputer. It uses the Cray
Linux Environment as its operating system.
Open Source Software
When programmers on the Internet can read,
redistribute, and modify the source for a
piece of software, it evolves
People improve it, people adapt it, people fix
bugs. And this can happen at a speed that,
compared to conventional software
development, seems astonishing
How we can get it
Download it from the Internet
But ?? first choose your
As Linux is open source so any one can develop
his own version.
Linux distros varies in Applications provided
Market imposed on us some distros as standard
(Redhat, Debian, Slackware).
Most of current distros are based on
Debian(Ubuntu) or Redhat (Fedora).
Popular Linux Distributions
Knoppix, a Live CD
Red Hat Enterprise Linux
Which is Suitable for Me?
Redhat is good for enterprise work.
Slackware is intended for Advanced
Mandriva is very good for non technical user.
Opensuse is good for training usage
Fedora is good for personal use and developing
Debian is good for professional end-users.
Ubuntu is suitable for ALL !!!
Forget about viruses
Security has always been the number one priority
Linux has a robust security system
There do not exist viruses for the Linux platform
Is your system is unstable !!
Have you ever lost your precious work because
Windows crashed? Have you ever gotten the "blue
screen of death" or error messages telling you
that the computer needs to be shut down for
Crashes or freezes are not prevalent in Linux
Linux is free
Linux is free and always will be as
compared to the very costly Windows and
Using pirated Windows is a bad thing
Linux comes with software built it
When the system has installed,
why would you still need to
install stuff ?
Common software such as
music player, web browser,
video player, image editor,
Update with few clicks !!
Just like Windows’ Update tool, Linux has a more
better alternative to it to update all your system
in a few clicks
Linux does not get slow
As Linux is impervious to viruses,
spywares, which are the main reasons
slow down the PC, systems based on it
do not get slower
Linux consumes lesser system
Linux can run on older hardware
Windows requires more
and more hardware
power as its version
number increases (95,
98, 2000, Me, XP, etc.).
Support is everywhere
If you’re having a
problem with Linux, help is as close as the
nearest message board.