Getting started with Linux
 ============================
  UNIX -> Bell LAB (1969)- Dennis Ritchie
       -> Based on "C" Language

  UNIX Distribution:
  ------------------
    => IBM - AIX
     => HP - HPUX
    => SUN - SUN Solaris
    => UNIX-BSD

1969 - UNIX was Devloped, Ken Thompson and Dennis Ritchie
1971 - First edition of Unix released 11/03/1971.
1983 - AT&T is splitted -> It can sell software
1983 - FSF - Free Software Foundation
1983 - The GNU project is first announced by Richard Stallman

GNU (GNU Not UNIX) - 1983

A program is free software if the program's users have the four essential freedoms:
===========================================================================

=> The freedom to run the program as you wish, for any purpose (freedom 0).
=> The freedom to study how the program works, and change as you wish (freedom 1).
=> The freedom to redistribute copies so you can help your neighbor (freedom 2).
=> The freedom to distribute copies of your modified versions to others (freedom 3).

By doing this you can give the whole community a chance to benefit from your changes.

1986 - HP-UX 1.0 released.
1987 - Sun introduced
1987 - Minix Released
1991 - Linux is introduced by Linus Torvalds, a student in Finland.
     Finland (Helsinki), 4th Year
1994 - Red Hat Linux is introduced.
1994 - Caldera, Inc was founded in 1994
2004 - The first release of Ubuntu is released October 20
2001 - Red Hat Enterprise Linux -

  Kernel:
  ------
  -> Hardware Management
  -> Process Management
  -> Driver Management
  -> Memory Mangement
   
 Linux Distribution:
 ------------------
  -> Red Hat (Commercial) ane Enterprise Support
  -> Fedora
  -> CentOS

  -> Scientific Linux
  -> Oracle Linux

  -> Ubuntu
  -> Debian
  -> Mint
  -> BackTrack
  -> Kali Linux
  -> ELEMENTARY

  -> Slackware
  -> Open SUSE
  -> Mandrake
  -> Open BSD
  -> Free BSD
  -> Android (Linux Kernel)

  Versoin:
  --------
   RHEL 6.0
   RHEL 6.1
   RHEL 6.2
         .
        .
   RHEL 6.5
   RHEL 7.0
   RHEL 7.1(Current)
   RHEL 7.2(Current)

  OS Types:
  --------
      => Desktop
      => Server
      => IBM PowerPC
      => Super Computer
      => LiveOS/cloud version

 OS Architecture:
 ----------------
  x86    (32 bit):i386, 2^32
  x86_64 (64 Bit):x64,  2^64

 Why Linux:
 ----------
 -> Security
 -> Free and Opensource
 -> 10x Times Faster Than Windows
 -> Lighter
 -> Virusless
 -> Crash Less
 -> Low Hardware Requirements
 -> Multiuser System & Multitasking System

 RHCSA - Red Hat Certified System Administrator (300 Marks)
 RHCE - Red Hat Certified Engineer (300 Marks)
  
   => Pass mark: 210 for each part
   => Cost: $450 + $120(Original Book)
   => Total RHCE in Bangladesh: 1200+
   => Exam Types: Fully LAB based exam
   => Duration: 6.0 Hrs (Apporx.)
   => Authorized Partner in BD: IBCS, ITBangla, AT, Patshala, BASE
  
Hardware Requirements:
----------------------
    => CPU: 1x 64/32 bit
    => RAM: 1GB (GUI), 512MB (CMD)
    => HDD: 10 GB
    => NIC: 1 FE

 Linux File System: ext2, ext3, ext4, xfs, birtFS, jfs
 Windows: NTFS, FAT32

 Drive Letter:
-------------
  Windows: C ..... Z
  Linux:     SATA -> sdx1, sdx2 .............. sdx15 (x=a,b,c,d)
                    DVD -> sr0/dvd
          USB -> sdx1 (x=a,b,c,d)
        
 Requied Partition:
 -------------------
 Windows: C
 Recommanded: Linux: "/boot", "/", "swap"
        => / (root), Swap (virtual Memory)

 Filesytem Size:
 --------------
                /boot: 500MB
        /    : as required (5G+)         
         swap: 1G+ depends on RAM (max 64GB)

 Linux Installation:
 -------------------
        => Dual Boot: Linux + others  (Free Space: 10G)
    => Single Boot: Linux
    => Virtual BOx/VMware (Free Space: 10G)

 Installaiton Kits:
 ------------------
    => Dual Boot: DVD/USB/Network
        => Single BOot: DVD/USB/Network
    => Virtual Box: ISO/DVD/Network

 System Administration
----------------------
 => Linux Installaiton
 => Working with Linux Desktop
 => linux command line utilities
 => Linux Text processing tools (cat,tail,grep,head,cut,pipe,less,more)
 => Linux Text Editor (vim/vi,nano)
 => User and group addministration
 => Linux Permission and ownership
 => Linux Disk Managagement
 => Process Management
 => job scheduling
 => Network configuration
 => Linux Package Management System
 => Virtualization with KVM

 Server/Network Administration:
-------------------------------
 => SSH application service
 => Linux security & NAT with firewalld
 => Samba file server
 => Apache HTTP Webserver (http and virutal hosting)
 => Scripting
 => DHCP Server
 => FTP Server
 => DNS server (Primary DNS)
 => Proxy server with Monitoring
 => Monitoring (cacti)
 => Mail server (postfix+dovecot+webmail+outlook)

 ==================== X ====================

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