Linux online traning with real-time experts

1
Linux Administration Online Training
www.iteducationalexperts.com
2
About Linux

• ABOUT LINUX
• This article is mainly written for the people who
  are not familiar with Linux operating system. I
  hope this article will help to understand the
  history behind the UNIX/LINUX Operating system.
  Before getting into the topic, we will see some
  important points of the Linux system
• Most of the computers are using Linux as a
  operating system as it is a Command line
  interface.
• LINUX is very popular and stable because
  computers running LINUX almost never crash.

www.iteducationalexperts.com
3
About Linux

• History of LINUX operating system
• LINUX can smoothly manage the large amount of
  data as it is very efficient.
• The UNIX story starts at AT T Bell laboratory
  in 1969. Ken Thompson and Dennis Ritchie ported a
  game, known as Space travel in Multics project.
  Thompson wrote a simple file system for porting a
  game. In 1973, The UNIX was rewritten in C by
  Thompson and Ritchie. In 1979, portable version
  of UNIX (Version 7) was released for general use.

www.iteducationalexperts.com
4
About Linux

• In 1991, Linux Torvalds who is a student of
  Helsinki University developed a UNIX like system
  called LINUX, to run on the Intel microprocessor.
  The Linux distributions, developed from 1993 are
  based on Torvalds kernel. Different versions of
  Linux distributions include Red Hat, Slackware,
  Caldera, Debian, Mandrake and so on.
• The Linux can be downloaded at free of charge.
  Today, LINUX has become fastest growing part of
  UNIX operating system.

www.iteducationalexperts.com
5
About Linux

• OPERATING SYSTEM OF A LINUX
• As we all know that the operating system is an
  interface between user and computer hardware. The
  operating system is a collection of software
  which manages computer hardwares and provides
  services for the programs.
• Linux is a layered operating system. The services
  provided to the operating system in Linux are the
  innermost layer called hardware.
• The Kernel which is the operating system in
  Linux interacts directly with the hardware and
  provides services to all the user programs. For
  the user programs, it is enough to know about how
  to interact with the kernel and no need to know
  anything about the hardware.

www.iteducationalexperts.com
6
About Linux

• Multi user Multi-tasking system
• Linux is a multi user Multi tasking operating
  system, which means many users can log in with
  each running multi programs at a time. The kernel
  will keep each processes and user separately and
  manages the hardware of the system along with
  CPU, I/O devices.
• As we know that the source code of the Linux is
  freely available, means anyone can add features
  and corrects the deficiencies of a Linux source
  code. Therefore, LINUX is known as a free open
  source operating system.

www.iteducationalexperts.com
7
About Linux

• Architecture of Linux Operating system
• The main important components of Linux operating
  system are
• Kernel
• The kernel is the core part of the Linux
  operating system, as it manages the hardware
  devices of a PC and keeps track of the disks,
  printers, tapes and many other devices. The
  latest versions of the kernel can be downloaded
  from http//www.kernel.org.
• Shell
• The Shell is an interface between user and
  kernel, known as Command interpreter. Even
  though, it is only a utility program, and is not
  a proper part of the system, it is a part which
  user sees. The shell translates our requests
  into actions by listening to the terminal on the
  part of a kernel.

www.iteducationalexperts.com
8
About Linux

• The shell is divided into two forms Command
  line shells and Graphical shells. The command
  line shell provides Command line interfaces and a
  Graphical line shell provides Graphical user
  interfaces. The Graphical shell performs
  operations slower than the Command line shells.
• Hardware
• The hardware layer of the Linux operating system
  includes peripheral devices like RAM, CPU and so
  on.
• It is easy to remember the architecture of the
  Linux system as a series of concentric circles.
  The innermost layer is the hardware and kernel
  including with the next layer as a shell and the
  outermost layer is the Application programs and
  utilities.

www.iteducationalexperts.com
9
About Linux

• Features of the Linux Operating system
• Portable and Open source
• The Linux kernel supports all types of hardware
  installations and can work with different types
  of hardwares. Source code of the Linux is also
  available freely.
• Multi user multi programming
• As already said, Linux operating system is a
  multi user and multi programming system.

www.iteducationalexperts.com
10
About Linux

• Security
• The Linux operating system provides security
  systems for the users by using authentication
  features such as password protection, encryption
  of data, controlling access to particular files
  and so on.
• Hierarchical File system
• The Linux operating system provides standard
  structure of the file where system or user files
  are arranged.
• Advantages of Linux operating system
• Low cost There is no need to spend more time and
  money for the license of Linux as it is available
  for free and software has GNU (General Public
  license).

www.iteducationalexperts.com
11
About Linux

• Stability There is no need of rebooting the
  system periodically to maintain the performance.
• Performance Linux can easily handle the bulk
  number of users simultaneously.
• Flexibility It is easy to save the disk space by
  installing only selected and wanted components.
• Compatibility Linux can run all UNIX software
  packages.

www.iteducationalexperts.com
12
About Linux

• Applications of Linux operating system
• Due to its reliability and stability, many
  companies like Google, facebook, Amazon and so on
  are using Linux as their servers. Some of the
  major application programs that use Linux are
• Abiword
• Firefox
• Apache
• Gnumeric
• GQview
• Gedit
• PHP
• Python
• My SQL
• Open office
• Rosegarden

www.iteducationalexperts.com
13
About Linux

• Some of the electronic devices which are using
  Linux are
• Dell inspiron Mini 9 and 12
• HP Mini 1000
• Google android
• Sony Reader
• Lenovo Ipad
• TiVo Digital video recorder.

www.iteducationalexperts.com
14
Linux

• For more details contact 91 9505099323,950506632
  3.
• Visit our website www.iteducationalexperts.com
• http//iteducationalexperts.com/linux-online-train
  ing/

www.iteducationalexperts.com